Encrypt eSign PDF Fast

The airSlate SignNow download esigner feature allows users to easily download and manage electronic signatures for their documents. This functionality enhances convenience by enabling quick access to signed documents anytime, anywhere. With this feature, you can ensure secure and efficient processing of your important files.

airSlate SignNow offers various pricing plans to cater to different business needs. The cost to download esigner depends on the selected plan, which ranges from basic to advanced features. You can explore the pricing options on our website to find a suitable plan for your organization.

The download esigner feature streamlines your document signing process, saving both time and resources. Users benefit from enhanced security and compliance, allowing for smoother workflows. Additionally, it simplifies collaboration among team members and clients by ensuring everyone has easy access to signed documents.

Yes, airSlate SignNow offers seamless integrations with various applications such as Google Drive, Salesforce, and more. When you download esigner, you can connect it with your favorite tools to enhance your workflow. This integration capability helps you manage documents more efficiently across platforms.

Absolutely! The airSlate SignNow platform is designed to be user-friendly on both desktop and mobile devices. You can easily download esigner on your smartphone or tablet, allowing you to sign documents on-the-go. This convenience ensures that you can manage your signing process from anywhere.

airSlate SignNow employs advanced security measures, including encryption and secure cloud storage, to protect your documents. When you download esigner, you can rest assured that your sensitive information remains confidential and safe from unauthorized access. We take document security seriously to provide peace of mind for our users.

While airSlate SignNow offers robust features, some limitations may exist depending on the plan you select. Each pricing tier comes with specific limits on usage or features. It’s best to review the plan details to ensure that your chosen package meets your business requirements fully.

Hey, there are couple of different ways to do this. 1. The most widespread one is actually print the pdf you have -%3E sign it manually -%3E scan it back into electronic version -%3E send it via email or any other way to the party requested the document with your signature. In 2017 this is still a very popular way to sign, according to a study we conducted during closed beta testing of signNow - our free esignature solution for Mac, iPhone/iPad, Android, Windows and web. More than 30% of 230+ SMB owners said this is the way they sign documents now. Though this way is at no-cost for you, at least if you have a printer and scanner / mobile app for scanning, there are major drawbacks for this solution like: * It takes too much time and efforts * It is very difficult and old fashioned * People can not sign or send documents for signing on the go * Response time and reliability * A need to follow-up and check if the document was received, viewed etc * Having to have printer and scanner * Papers get lost More answers on that are in this topic already https://www.quora.com/Have-you-considered-using-e-Signature-for-your-business 2. Using ready-made esignature apps like signNow [ https://www.keepsolid.com/sign/ ]. This kind of a solution allows: * to sign or send your contracts, agreements, invoices etc on your favorite devices, even on the go and sync everything in seconds * work with documents offline and access all your files remotely * use smart templates + status tracking + reminders: start from scratch creating your document from a template, track the status and remind involved parties to sign it * to secure your sensitive data with high-grade AES-256 encryptionTo enjoy clean&simple UI – according to our beta users Other great eSign solutions are gathered in this topic https://www.quora.com/What-is-the-best-way-to-sign-a-PDF-document or you can find different eSignature alternatives here [ https://alternativeto.net/software/keepsolid-sign/ ]. 3. Use Apple’s Preview app (the built-in default app for Mac to view pictureы, edit and also sign pdfs). 4. Pgp encryption. The approach here would be open the document in PDF app or in browser, paste your signature, encrypt with the pgp encryption tool like iGolder or built-in solutions for Mozilla, for example. Though, both of the last two methods still require you to send the final document via email, these are free alternative if you need to sign documents rarely or just don’t want to pay for a dedicated eSignature solution. Cheers!

I recommend you going through the following list of projects that surely will help you improve your programming skills. Numbers: Find PI to the Nth Digit - Enter a number and have the program generate PI up to that many decimal places. Keep a limit to how far the program will go. Find e to the Nth Digit - Just like the previous problem, but with e instead of PI. Enter a number and have the program generate e up to that many decimal places. Keep a limit to how far the program will go. Fibonacci Sequence - Enter a number and have the program generate the Fibonacci sequence to that number or to the Nth number. Prime Factorization - Have the user enter a number and find all Prime Factors (if there are any) and display them. Next Prime Number - Have the program find prime numbers until the user chooses to stop asking for the next one. Find Cost of Tile to Cover W x H Floor - Calculate the total cost of tile it would take to cover a floor plan of width and height, using a cost entered by the user. Mortgage Calculator - Calculate the monthly payments of a fixed term mortgage over given Nth terms at a given interest rate. Also figure out how long it will take the user to pay back the loan. For added complexity, add an option for users to select the compounding interval (Monthly, Weekly, Daily, Continually). Change Return Program - The user enters a cost and then the amount of money given. The program will figure out the change and the number of quarters, dimes, nickels, pennies needed for the change. Binary to Decimal and Back Converter - Develop a converter to convert a decimal number to binary or a binary number to its decimal equivalent. Calculator - A simple calculator to do basic operators. Make it a scientific calculator for added complexity. Unit Converter (temp, currency, volume, mass and more) - Converts various units between one another. The user enters the type of unit being entered, the type of unit they want to convert to and then the value. The program will then make the conversion. Alarm Clock - A simple clock where it plays a sound after X number of minutes/seconds or at a particular time. Distance Between Two Cities - Calculates the distance between two cities and allows the user to specify a unit of distance. This program may require finding coordinates for the cities like latitude and longitude. Credit Card Validator - Takes in a credit card number from a common credit card vendor (Visa, MasterCard, American Express, Discoverer) and validates it to make sure that it is a valid number (look into how credit cards use a checksum). Tax Calculator - Asks the user to enter a cost and either a country or state tax. It then returns the tax plus the total cost with tax. Factorial Finder - The Factorial of a positive integer, n, is defined as the product of the sequence n, n-1, n-2, ...1 and the factorial of zero, 0, is defined as being 1. Solve this using both loops and recursion. Complex Number Algebra - Show addition, multiplication, negation, and inversion of complex numbers in separate functions. (Subtraction and division operations can be made with pairs of these operations.) Print the results for each operation tested. Happy Numbers - A happy number is defined by the following process. Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. Those numbers for which this process ends in 1 are happy numbers, while those that do not end in 1 are unhappy numbers. Display an example of your output here. Find first 8 happy numbers. Number Names - Show how to spell out a number in English. You can use a preexisting implementation or roll your own, but you should support inputs up to at least one million (or the maximum value of your language's default bounded integer type, if that's less). Optional: Support for inputs other than positive integers (like zero, negative integers, and floating-point numbers). Coin Flip Simulation - Write some code that simulates flipping a single coin however many times the user decides. The code should record the outcomes and count the number of tails and heads. Limit Calculator - Ask the user to enter f(x) and the limit value, then return the value of the limit statement Optional: Make the calculator capable of supporting infinite limits. Fast Exponentiation - Ask the user to enter 2 integers a and b and output a^b (i.e. pow(a,b)) in O(lg n) time complexity. Classic Algorithms: Collatz Conjecture - Start with a number n %3E 1. Find the number of steps it takes to signNow one using the following process: If n is even, divide it by 2. If n is odd, multiply it by 3 and add 1. Sorting - Implement two types of sorting algorithms: Merge sort and bubble sort. Closest pair problem - The closest pair of points problem or closest pair problem is a problem of computational geometry: given n points in metric space, find a pair of points with the smallest distance between them. Sieve of Eratosthenes - The sieve of Eratosthenes is one of the most efficient ways to find all of the smaller primes (below 10 million or so). Graph Graph from links - Create a program that will create a graph or network from a series of links. Eulerian Path - Create a program which will take as an input a graph and output either a Eulerian path or a Eulerian cycle, or state that it is not possible. A Eulerian Path starts at one node and traverses every edge of a graph through every node and finishes at another node. A Eulerian cycle is a eulerian Path that starts and finishes at the same node. Connected Graph - Create a program which takes a graph as an input and outputs whether every node is connected or not. Dijkstra’s Algorithm - Create a program that finds the shortest path through a graph using its edges. Minimum Spanning Tree - Create a program which takes a connected, undirected graph with weights and outputs the minimum spanning tree of the graph i.e., a subgraph that is a tree, contains all the vertices, and the sum of its weights is the least possible. Data Structures Inverted index - An Inverted Index [ http://en.wikipedia.org/wiki/Inverted_index ] is a data structure used to create full text search. Given a set of text files, implement a program to create an inverted index. Also create a user interface to do a search using that inverted index which returns a list of files that contain the query term / terms. The search index can be in memory. Text Fizz Buzz - Write a program that prints the numbers from 1 to 100. But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”. For numbers which are multiples of both three and five print “FizzBuzz”. Reverse a String - Enter a string and the program will reverse it and print it out. Pig Latin - Pig Latin is a game of alterations played on the English language game. To create the Pig Latin form of an English word the initial consonant sound is transposed to the end of the word and an ay is affixed (Ex.: "banana" would yield anana-bay). Read Wikipedia for more information on rules. Count Vowels - Enter a string and the program counts the number of vowels in the text. For added complexity have it report a sum of each vowel found. Check if Palindrome - Checks if the string entered by the user is a palindrome. That is that it reads the same forwards as backwards like “racecar” Count Words in a String - Counts the number of individual words in a string. For added complexity read these strings in from a text file and generate a summary. Text Editor - Notepad style application that can open, edit, and save text documents. Optional: Add syntax highlighting and other features. RSS Feed Creator - Given a link to RSS/Atom Feed, get all posts and display them. Quote Tracker (market symbols etc) - A program which can go out and check the current value of stocks for a list of symbols entered by the user. The user can set how often the stocks are checked. For CLI, show whether the stock has moved up or down. Optional: If GUI, the program can show green up and red down arrows to show which direction the stock value has moved. Guestbook / Journal - A simple application that allows people to add comments or write journal entries. It can allow comments or not and timestamps for all entries. Could also be made into a shout box. Optional: Deploy it on Google App Engine or Heroku or any other PaaS (if possible, of course). Vigenere / Vernam / Ceasar Ciphers - Functions for encrypting and decrypting data messages. Then send them to a friend. Regex Query Tool - A tool that allows the user to enter a text string and then in a separate control enter a regex pattern. It will run the regular expression against the source text and return any matches or flag errors in the regular expression. Networking FTP Program - A file transfer program which can transfer files back and forth from a remote web sever. Bandwidth Monitor - A small utility program that tracks how much data you have uploaded and downloaded from the net during the course of your current online session. See if you can find out what periods of the day you use more and less and generate a report or graph that shows it. Port Scanner - Enter an IP address and a port range where the program will then attempt to find open ports on the given computer by connecting to each of them. On any successful connections mark the port as open. Mail Checker (POP3 / IMAP) - The user enters various account information include web server and IP, protocol type (POP3 or IMAP) and the application will check for email at a given interval. Country from IP Lookup - Enter an IP address and find the country that IP is registered in. Optional: Find the Ip automatically. Whois Search Tool - Enter an IP or host address and have it look it up through whois and return the results to you. Site Checker with Time Scheduling - An application that attempts to connect to a website or server every so many minutes or a given time and check if it is up. If it is down, it will notify you by email or by posting a notice on screen. Classes Product Inventory Project - Create an application which manages an inventory of products. Create a product class which has a price, id, and quantity on hand. Then create an inventory class which keeps track of various products and can sum up the inventory value. Airline / Hotel Reservation System - Create a reservation system which books airline seats or hotel rooms. It charges various rates for particular sections of the plane or hotel. Example, first class is going to cost more than coach. Hotel rooms have penthouse suites which cost more. Keep track of when rooms will be available and can be scheduled. Company Manager - Create an hierarchy of classes - abstract class Employee and subclasses HourlyEmployee, SalariedEmployee, Manager and Executive. Every one's pay is calculated differently, research a bit about it. After you've established an employee hierarchy, create a Company class that allows you to manage the employees. You should be able to hire, fire and raise employees. Bank Account Manager - Create a class called Account which will be an abstract class for three other classes called CheckingAccount, SavingsAccount and BusinessAccount. Manage credits and debits from these accounts through an ATM style program. Patient / Doctor Scheduler - Create a patient class and a doctor class. Have a doctor that can handle multiple patients and setup a scheduling program where a doctor can only handle 16 patients during an 8 hr work day. Recipe Creator and Manager - Create a recipe class with ingredients and a put them in a recipe manager program that organizes them into categories like deserts, main courses or by ingredients like chicken, beef, soups, pies etc. Image Gallery - Create an image abstract class and then a class that inherits from it for each image type. Put them in a program which displays them in a gallery style format for viewing. Shape Area and Perimeter Classes - Create an abstract class called Shape and then inherit from it other shapes like diamond, rectangle, circle, triangle etc. Then have each class override the area and perimeter functionality to handle each shape type. Flower Shop Ordering To Go - Create a flower shop application which deals in flower objects and use those flower objects in a bouquet object which can then be sold. Keep track of the number of objects and when you may need to order more. Family Tree Creator - Create a class called Person which will have a name, when they were born and when (and if) they died. Allow the user to create these Person classes and put them into a family tree structure. Print out the tree to the screen. Threading Create A Progress Bar for Downloads - Create a progress bar for applications that can keep track of a download in progress. The progress bar will be on a separate thread and will communicate with the main thread using delegates. Bulk Thumbnail Creator - Picture processing can take a bit of time for some transformations. Especially if the image is large. Create an image program which can take hundreds of images and converts them to a specified size in the background thread while you do other things. For added complexity, have one thread handling re-sizing, have another bulk renaming of thumbnails etc. Web Page Scraper - Create an application which connects to a site and pulls out all links, or images, and saves them to a list. Optional: Organize the indexed content and don’t allow duplicates. Have it put the results into an easily searchable index file. Online White Board - Create an application which allows you to draw pictures, write notes and use various colors to flesh out ideas for projects. Optional: Add feature to invite friends to collaborate on a white board online. Get Atomic Time from Internet Clock - This program will get the true atomic time from an atomic time clock on the Internet. Use any one of the atomic clocks returned by a simple Google search. Fetch Current Weather - Get the current weather for a given zip/postal code. Optional: Try locating the user automatically. Scheduled Auto Login and Action - Make an application which logs into a given site on a schedule and invokes a certain action and then logs out. This can be useful for checking web mail, posting regular content, or getting info for other applications and saving it to your computer. E-Card Generator - Make a site that allows people to generate their own little e-cards and send them to other people. Do not use Flash. Use a picture library and perhaps insightful mottos or quotes. Content Management System - Create a content management system (CMS) like Joomla, Drupal, PHP Nuke etc. Start small. Optional: Allow for the addition of modules/addons. Web Board (Forum) - Create a forum for you and your buddies to post, administer and share thoughts and ideas. CAPTCHA Maker - Ever see those images with letters a numbers when you signup for a service and then asks you to enter what you see? It keeps web bots from automatically signing up and spamming. Try creating one yourself for online forms. Files Quiz Maker - Make an application which takes various questions from a file, picked randomly, and puts together a quiz for students. Each quiz can be different and then reads a key to grade the quizzes. Sort Excel/CSV File Utility - Reads a file of records, sorts them, and then writes them back to the file. Allow the user to choose various sort style and sorting based on a particular field. Create Zip File Maker - The user enters various files from different directories and the program zips them up into a zip file. Optional: Apply actual compression to the files. Start with Huffman Algorithm. PDF Generator - An application which can read in a text file, html file or some other file and generates a PDF file out of it. Great for a web based service where the user uploads the file and the program returns a PDF of the file. Optional: Deploy on GAE or Heroku if possible. Mp3 Tagger - Modify and add ID3v1 tags to MP3 files. See if you can also add in the album art into the MP3 file’s header as well as other ID3v2 tags. Code Snippet Manager - Another utility program that allows coders to put in functions, classes or other tidbits to save for use later. Organized by the type of snippet or language the coder can quickly look up code. Optional: For extra practice try adding syntax highlighting based on the language. Databases SQL Query Analyzer - A utility application which a user can enter a query and have it run against a local database and look for ways to make it more efficient. Remote SQL Tool - A utility that can execute queries on remote servers from your local computer across the Internet. It should take in a remote host, user name and password, run the query and return the results. Report Generator - Create a utility that generates a report based on some tables in a database. Generates a sales reports based on the order/order details tables or sums up the days current database activity. Event Scheduler and Calendar - Make an application which allows the user to enter a date and time of an event, event notes and then schedule those events on a calendar. The user can then browse the calendar or search the calendar for specific events. Optional: Allow the application to create re-occurrence events that reoccur every day, week, month, year etc. Budget Tracker - Write an application that keeps track of a household’s budget. The user can add expenses, income, and recurring costs to find out how much they are saving or losing over a period of time. Optional: Allow the user to specify a date range and see the net flow of money in and out of the house budget for that time period. TV Show Tracker - Got a favorite show you don’t want to miss? Don’t have a PVR or want to be able to find the show to then PVR it later? Make an application which can search various online TV Guide sites, locate the shows/times/channels and add them to a database application. The database/website then can send you email reminders that a show is about to start and which channel it will be on. Travel Planner System - Make a system that allows users to put together their own little travel itinerary and keep track of the airline / hotel arrangements, points of interest, budget and schedule. Graphics and Multimedia Slide Show - Make an application that shows various pictures in a slide show format. Optional: Try adding various effects like fade in/out, star wipe and window blinds transitions. Stream Video from Online - Try to create your own online streaming video player. Mp3 Player - A simple program for playing your favorite music files. Add features you think are missing from your favorite music player. Watermarking Application - Have some pictures you want copyright protected? Add your own logo or text lightly across the background so that no one can simply steal your graphics off your site. Make a program that will add this watermark to the picture. Optional: Use threading to process multiple images simultaneously. Turtle Graphics - This is a common project where you create a floor of 20 x 20 squares. Using various commands you tell a turtle to draw a line on the floor. You have move forward, left or right, lift or drop pen etc. Do a search online for "Turtle Graphics" for more information. Optional: Allow the program to read in the list of commands from a file. GIF Creator A program that puts together multiple images (PNGs, JPGs, TIFFs) to make a smooth GIF that can be exported. Optional: Make the program convert small video files to GIFs as well. Security Caesar cipher - Implement a Caesar cipher, both encoding and decoding. The key is an integer from 1 to 25. This cipher rotates the letters of the alphabet (A to Z). The encoding replaces each letter with the 1st to 25th next letter in the alphabet (wrapping Z to A). So key 2 encrypts "HI" to "JK", but key 20 encrypts "HI" to "BC". This simple "monoalphabetic substitution cipher" provides almost no security, because an attacker who has the encoded message can either use frequency analysis to guess the key, or just try all 25 keys. Source: vikaskyadav/Projects [ https://github.com/vikaskyadav/Projects ]

It depends surely on several factors - how much space you need, the levels of security, the features you require, the OS you are using. I will take a look at some of the most popular apps and how much they give you for free.1) Google DriveFirst of all it's from Google, so it gives you the benefit of being the heart of various services that Google currently offers. On setting up your Google account or linking your existing one to Drive, you get an instant free storage of 15GB, more than any other storage app offers. Now, this storage space will shared by all your Google services. Like wh...

The Digital Signature Market Research Report provides value chain analysis on the revenue for the forecast period 2016-2023 and estimates for each application in terms of market size, share, trend and growth. Furthermore, the report quantifies the market share held by the major players of the industry and provides an in-depth view of the competitive landscape. This market is classified into different segments with detailed analysis of each with respect to geography for the study period.The market size in terms of revenue (USD MN) is calculated for the study period along with the details of ...

I have been programming in Python since 8 years now and in this answer I will try to share my experience. Edit: TLDR: 1. Learn Python Basics from : Welcome to Python.org [ https://www.python.org/doc/ ] 2. Best resource to learn as per me: The Complete Python Masterclass: Learn Python From Scratch [ https://www.udemy.com/python-masterclass-course/?couponCode=PYNEWQ ]. Here are the course content along with the section durations: 1. Final step: Build projects on your own. More than 100+ project ideas are listed below in the answer. The most common mistake a newbie programmer makes is to start learning some programming language without any specific purpose or goal in mind. Before you start learning Python or any programming language for that matter, you should have a certain goal in mind. You should question yourself “Why exactly do I want to learn Python?” For example you might want to be a data scientist or you just want to design web apps or build APIs. Once you have decided your main goal learning becomes much easier, efficient and faster. Now lets get to the actual answer: Python basics: If you are completely new to python then its important to know the basic syntax. Here are a few basic concepts which you should be aware of: 1. Variables, Strings and accepting user input. 2. Control structure in python such as if-else statement. 3. Loops: For and while loops. 4. Functions and modules, built-in functions like Range. 5. Exception handling . 6. File handling. Important topics: Once the basics are taken care of, you can move to other important topics which are listed below. Note that these topics are the most widely used and special attention should be paid to these: 1. Object oriented programming. (Useful while using Python Framework like Django). 2. List, Tuples & Dictionaries. (Useful in data analysis). 3. List comprehension. 4. Map and filter. 5. Lambda functions. 6. Regular expressions (One of the superpowers of Python and widely used in Django). Now once you are done with above basics, lets proceed to some interesting python frameworks and libraries. For building GUI apps: 1. Tkinter. 2. PyQt. Build dynamic web based application: 1. Django( One of my favourites) 2. Flask. Data analysis: 1. Pandas. 2. Numpy. Web crawling: 1. Beautiful soup. 2. Scrapy. Which learning resources do I recommend? Honestly, I would prefer a learning resource which suits your style. For me I would prefer learning via official Python documentation for Python basics. Here is a link to the docs: Welcome to Python.org [ https://www.python.org/doc/ ] If you want a one-stop solution to all of your Python needs then I would recommend this course: The Complete Python Masterclass: Learn Python From Scratch [ https://www.udemy.com/python-masterclass-course/?couponCode=PYTHONEWQ ] . I have listed this course because it delivers what is promised. It covers Python basics, Object oriented programming, Tkinter, Flask, Web-scraping, Data analysis using Numpy and Pandas and also has some projects to build some cool applications. Next steps: Once you have completed the above topics to a level that you are comfortable to work with, then you can start building your own projects. One interesting thing about Python is that there is a lot you can do with Python. Note: Here are a few project ideas listed below which you can try, I will try to keep the list updated: Numbers Find PI to the Nth Digit - Enter a number and have the program generate PI up to that many decimal places. Keep a limit to how far the program will go. Find e to the Nth Digit - Just like the previous problem, but with e instead of PI. Enter a number and have the program generate e up to that many decimal places. Keep a limit to how far the program will go. Fibonacci Sequence - Enter a number and have the program generate the Fibonacci sequence to that number or to the Nth number. Prime Factorization - Have the user enter a number and find all Prime Factors (if there are any) and display them. Next Prime Number - Have the program find prime numbers until the user chooses to stop asking for the next one. Find Cost of Tile to Cover W x H Floor - Calculate the total cost of tile it would take to cover a floor plan of width and height, using a cost entered by the user. Mortgage Calculator - Calculate the monthly payments of a fixed term mortgage over given Nth terms at a given interest rate. Also figure out how long it will take the user to pay back the loan. For added complexity, add an option for users to select the compounding interval (Monthly, Weekly, Daily, Continually). Change Return Program - The user enters a cost and then the amount of money given. The program will figure out the change and the number of quarters, dimes, nickels, pennies needed for the change. Binary to Decimal and Back Converter - Develop a converter to convert a decimal number to binary or a binary number to its decimal equivalent. Calculator - A simple calculator to do basic operators. Make it a scientific calculator for added complexity. Unit Converter (temp, currency, volume, mass and more) - Converts various units between one another. The user enters the type of unit being entered, the type of unit they want to convert to and then the value. The program will then make the conversion. Alarm Clock - A simple clock where it plays a sound after X number of minutes/seconds or at a particular time. Distance Between Two Cities - Calculates the distance between two cities and allows the user to specify a unit of distance. This program may require finding coordinates for the cities like latitude and longitude. Credit Card Validator - Takes in a credit card number from a common credit card vendor (Visa, MasterCard, American Express, Discoverer) and validates it to make sure that it is a valid number (look into how credit cards use a checksum). Tax Calculator - Asks the user to enter a cost and either a country or state tax. It then returns the tax plus the total cost with tax. Factorial Finder - The Factorial of a positive integer, n, is defined as the product of the sequence n, n-1, n-2, ...1 and the factorial of zero, 0, is defined as being 1. Solve this using both loops and recursion. Complex Number Algebra - Show addition, multiplication, negation, and inversion of complex numbers in separate functions. (Subtraction and division operations can be made with pairs of these operations.) Print the results for each operation tested. Happy Numbers - A happy number is defined by the following process. Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. Those numbers for which this process ends in 1 are happy numbers, while those that do not end in 1 are unhappy numbers. Display an example of your output here. Find first 8 happy numbers. Number Names - Show how to spell out a number in English. You can use a preexisting implementation or roll your own, but you should support inputs up to at least one million (or the maximum value of your language's default bounded integer type, if that's less). Optional: Support for inputs other than positive integers (like zero, negative integers, and floating-point numbers). Coin Flip Simulation - Write some code that simulates flipping a single coin however many times the user decides. The code should record the outcomes and count the number of tails and heads. Limit Calculator - Ask the user to enter f(x) and the limit value, then return the value of the limit statement Optional: Make the calculator capable of supporting infinite limits. Fast Exponentiation - Ask the user to enter 2 integers a and b and output a^b (i.e. pow(a,b)) in O(lg n) time complexity. Classic Algorithms Collatz Conjecture - Start with a number n %3E 1. Find the number of steps it takes to signNow one using the following process: If n is even, divide it by 2. If n is odd, multiply it by 3 and add 1. Sorting - Implement two types of sorting algorithms: Merge sort and bubble sort. Closest pair problem - The closest pair of points problem or closest pair problem is a problem of computational geometry: given n points in metric space, find a pair of points with the smallest distance between them. Sieve of Eratosthenes - The sieve of Eratosthenes is one of the most efficient ways to find all of the smaller primes (below 10 million or so). Graph Graph from links - Create a program that will create a graph or network from a series of links. Eulerian Path - Create a program which will take as an input a graph and output either a Eulerian path or a Eulerian cycle, or state that it is not possible. A Eulerian Path starts at one node and traverses every edge of a graph through every node and finishes at another node. A Eulerian cycle is a eulerian Path that starts and finishes at the same node. Connected Graph - Create a program which takes a graph as an input and outputs whether every node is connected or not. Dijkstra’s Algorithm - Create a program that finds the shortest path through a graph using its edges. Minimum Spanning Tree - Create a program which takes a connected, undirected graph with weights and outputs the minimum spanning tree of the graph i.e., a subgraph that is a tree, contains all the vertices, and the sum of its weights is the least possible. Data Structures Inverted index - An Inverted Index is a data structure used to create full text search. Given a set of text files, implement a program to create an inverted index. Also create a user interface to do a search using that inverted index which returns a list of files that contain the query term / terms. The search index can be in memory. Text Fizz Buzz - Write a program that prints the numbers from 1 to 100. But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”. For numbers which are multiples of both three and five print “FizzBuzz”. Reverse a String - Enter a string and the program will reverse it and print it out. Pig Latin - Pig Latin is a game of alterations played on the English language game. To create the Pig Latin form of an English word the initial consonant sound is transposed to the end of the word and an ay is affixed (Ex.: "banana" would yield anana-bay). Read Wikipedia for more information on rules. Count Vowels - Enter a string and the program counts the number of vowels in the text. For added complexity have it report a sum of each vowel found. Check if Palindrome - Checks if the string entered by the user is a palindrome. That is that it reads the same forwards as backwards like “racecar” Count Words in a String - Counts the number of individual words in a string. For added complexity read these strings in from a text file and generate a summary. Text Editor - Notepad style application that can open, edit, and save text documents. Optional: Add syntax highlighting and other features. RSS Feed Creator - Given a link to RSS/Atom Feed, get all posts and display them. Quote Tracker (market symbols etc) - A program which can go out and check the current value of stocks for a list of symbols entered by the user. The user can set how often the stocks are checked. For CLI, show whether the stock has moved up or down. Optional: If GUI, the program can show green up and red down arrows to show which direction the stock value has moved. Guestbook / Journal - A simple application that allows people to add comments or write journal entries. It can allow comments or not and timestamps for all entries. Could also be made into a shout box. Optional: Deploy it on Google App Engine or Heroku or any other PaaS (if possible, of course). Vigenere / Vernam / Ceasar Ciphers - Functions for encrypting and decrypting data messages. Then send them to a friend. Regex Query Tool - A tool that allows the user to enter a text string and then in a separate control enter a regex pattern. It will run the regular expression against the source text and return any matches or flag errors in the regular expression. Networking FTP Program - A file transfer program which can transfer files back and forth from a remote web sever. Bandwidth Monitor - A small utility program that tracks how much data you have uploaded and downloaded from the net during the course of your current online session. See if you can find out what periods of the day you use more and less and generate a report or graph that shows it. Port Scanner - Enter an IP address and a port range where the program will then attempt to find open ports on the given computer by connecting to each of them. On any successful connections mark the port as open. Mail Checker (POP3 / IMAP) - The user enters various account information include web server and IP, protocol type (POP3 or IMAP) and the application will check for email at a given interval. Country from IP Lookup - Enter an IP address and find the country that IP is registered in. Optional: Find the Ip automatically. Whois Search Tool - Enter an IP or host address and have it look it up through whois and return the results to you. Site Checker with Time Scheduling - An application that attempts to connect to a website or server every so many minutes or a given time and check if it is up. If it is down, it will notify you by email or by posting a notice on screen. Classes Product Inventory Project - Create an application which manages an inventory of products. Create a product class which has a price, id, and quantity on hand. Then create an inventory class which keeps track of various products and can sum up the inventory value. Airline / Hotel Reservation System - Create a reservation system which books airline seats or hotel rooms. It charges various rates for particular sections of the plane or hotel. Example, first class is going to cost more than coach. Hotel rooms have penthouse suites which cost more. Keep track of when rooms will be available and can be scheduled. Company Manager - Create an hierarchy of classes - abstract class Employee and subclasses HourlyEmployee, SalariedEmployee, Manager and Executive. Every one's pay is calculated differently, research a bit about it. After you've established an employee hierarchy, create a Company class that allows you to manage the employees. You should be able to hire, fire and raise employees. Bank Account Manager - Create a class called Account which will be an abstract class for three other classes called CheckingAccount, SavingsAccount and BusinessAccount. Manage credits and debits from these accounts through an ATM style program. Patient / Doctor Scheduler - Create a patient class and a doctor class. Have a doctor that can handle multiple patients and setup a scheduling program where a doctor can only handle 16 patients during an 8 hr work day. Recipe Creator and Manager - Create a recipe class with ingredients and a put them in a recipe manager program that organizes them into categories like deserts, main courses or by ingredients like chicken, beef, soups, pies etc. Image Gallery - Create an image abstract class and then a class that inherits from it for each image type. Put them in a program which displays them in a gallery style format for viewing. Shape Area and Perimeter Classes - Create an abstract class called Shape and then inherit from it other shapes like diamond, rectangle, circle, triangle etc. Then have each class override the area and perimeter functionality to handle each shape type. Flower Shop Ordering To Go - Create a flower shop application which deals in flower objects and use those flower objects in a bouquet object which can then be sold. Keep track of the number of objects and when you may need to order more. Family Tree Creator - Create a class called Person which will have a name, when they were born and when (and if) they died. Allow the user to create these Person classes and put them into a family tree structure. Print out the tree to the screen. Threading Create A Progress Bar for Downloads - Create a progress bar for applications that can keep track of a download in progress. The progress bar will be on a separate thread and will communicate with the main thread using delegates. Bulk Thumbnail Creator - Picture processing can take a bit of time for some transformations. Especially if the image is large. Create an image program which can take hundreds of images and converts them to a specified size in the background thread while you do other things. For added complexity, have one thread handling re-sizing, have another bulk renaming of thumbnails etc. Web Page Scraper - Create an application which connects to a site and pulls out all links, or images, and saves them to a list. Optional: Organize the indexed content and don’t allow duplicates. Have it put the results into an easily searchable index file. Online White Board - Create an application which allows you to draw pictures, write notes and use various colors to flesh out ideas for projects. Optional: Add feature to invite friends to collaborate on a white board online. Get Atomic Time from Internet Clock - This program will get the true atomic time from an atomic time clock on the Internet. Use any one of the atomic clocks returned by a simple Google search. Fetch Current Weather - Get the current weather for a given zip/postal code. Optional: Try locating the user automatically. Scheduled Auto Login and Action - Make an application which logs into a given site on a schedule and invokes a certain action and then logs out. This can be useful for checking web mail, posting regular content, or getting info for other applications and saving it to your computer. E-Card Generator - Make a site that allows people to generate their own little e-cards and send them to other people. Do not use Flash. Use a picture library and perhaps insightful mottos or quotes. Content Management System - Create a content management system (CMS) like Joomla, Drupal, PHP Nuke etc. Start small. Optional: Allow for the addition of modules/addons. Web Board (Forum) - Create a forum for you and your buddies to post, administer and share thoughts and ideas. CAPTCHA Maker - Ever see those images with letters a numbers when you signup for a service and then asks you to enter what you see? It keeps web bots from automatically signing up and spamming. Try creating one yourself for online forms. Files Quiz Maker - Make an application which takes various questions from a file, picked randomly, and puts together a quiz for students. Each quiz can be different and then reads a key to grade the quizzes. Sort Excel/CSV File Utility - Reads a file of records, sorts them, and then writes them back to the file. Allow the user to choose various sort style and sorting based on a particular field. Create Zip File Maker - The user enters various files from different directories and the program zips them up into a zip file. Optional: Apply actual compression to the files. Start with Huffman Algorithm. PDF Generator - An application which can read in a text file, html file or some other file and generates a PDF file out of it. Great for a web based service where the user uploads the file and the program returns a PDF of the file. Optional: Deploy on GAE or Heroku if possible. Mp3 Tagger - Modify and add ID3v1 tags to MP3 files. See if you can also add in the album art into the MP3 file’s header as well as other ID3v2 tags. Code Snippet Manager - Another utility program that allows coders to put in functions, classes or other tidbits to save for use later. Organized by the type of snippet or language the coder can quickly look up code. Optional: For extra practice try adding syntax highlighting based on the language. Databases SQL Query Analyzer - A utility application which a user can enter a query and have it run against a local database and look for ways to make it more efficient. Remote SQL Tool - A utility that can execute queries on remote servers from your local computer across the Internet. It should take in a remote host, user name and password, run the query and return the results. Report Generator - Create a utility that generates a report based on some tables in a database. Generates a sales reports based on the order/order details tables or sums up the days current database activity. Event Scheduler and Calendar - Make an application which allows the user to enter a date and time of an event, event notes and then schedule those events on a calendar. The user can then browse the calendar or search the calendar for specific events. Optional: Allow the application to create re-occurrence events that reoccur every day, week, month, year etc. Budget Tracker - Write an application that keeps track of a household’s budget. The user can add expenses, income, and recurring costs to find out how much they are saving or losing over a period of time. Optional: Allow the user to specify a date range and see the net flow of money in and out of the house budget for that time period. TV Show Tracker - Got a favorite show you don’t want to miss? Don’t have a PVR or want to be able to find the show to then PVR it later? Make an application which can search various online TV Guide sites, locate the shows/times/channels and add them to a database application. The database/website then can send you email reminders that a show is about to start and which channel it will be on. Travel Planner System - Make a system that allows users to put together their own little travel itinerary and keep track of the airline / hotel arrangements, points of interest, budget and schedule. Graphics and Multimedia Slide Show - Make an application that shows various pictures in a slide show format. Optional: Try adding various effects like fade in/out, star wipe and window blinds transitions. Stream Video from Online - Try to create your own online streaming video player. Mp3 Player - A simple program for playing your favorite music files. Add features you think are missing from your favorite music player. Watermarking Application - Have some pictures you want copyright protected? Add your own logo or text lightly across the background so that no one can simply steal your graphics off your site. Make a program that will add this watermark to the picture. Optional: Use threading to process multiple images simultaneously. Turtle Graphics - This is a common project where you create a floor of 20 x 20 squares. Using various commands you tell a turtle to draw a line on the floor. You have move forward, left or right, lift or drop pen etc. Do a search online for "Turtle Graphics" for more information. Optional: Allow the program to read in the list of commands from a file. GIF Creator A program that puts together multiple images (PNGs, JPGs, TIFFs) to make a smooth GIF that can be exported. Optional: Make the program convert small video files to GIFs as well. Security Caesar cipher - Implement a Caesar cipher, both encoding and decoding. The key is an integer from 1 to 25. This cipher rotates the letters of the alphabet (A to Z). The encoding replaces each letter with the 1st to 25th next letter in the alphabet (wrapping Z to A). So key 2 encrypts "HI" to "JK", but key 20 encrypts "HI" to "BC". This simple "monoalphabetic substitution cipher" provides almost no security, because an attacker who has the encoded message can either use frequency analysis to guess the key, or just try all 25 keys. I hope this helps.

In Google play store, till date we have millions of apps and counting.But, we use only some basic apps like Whatsapp, Facebook, Gmail, Share it, etc all the time in our so called smartphones.Why don’t we use it real smart ?There are also numerous very useful applications present in play store, of which most of us didn’t even heard of. I will give you a brief knowledge of what these apps are and what their functionalities are.So, why don’t you give a try ! You can thank me later !Brace yourself. Next ten to fifteen minutes going to help you for your lifetime !! :)Here is a list of those helpful apps that i came across :Photomath app :Simply point your camera toward a math problem and Photomath will magically show the result with detailed step-by-step instructions.Photomath provides camera calculator, handwriting recognition, step-by-step instructions, smart calculator.Use Photomath+ for more powerful features like complete step-by-step instructions, colorful explanations and extra math knowledge.CallAmbulance app :Call ambulance is a platform where emergency providers have to be on a network. Currently, Call ambulance is focused on Hyderabad, India and expanding to other cities soon.Even if you are not in Hyderabad, you can use the application to get your family informed, build your own blood donor friends network & many other features. working with various hospitals to prepare them with your health records and insurance details prior to arriving at your location.Gets your location in the hands of emergency provider such as GVK EMRI so that ambulance manager, driver knows your location and signNow you as fast as possible.Gets your doctor at destination hospital know your health condition and health history, so that they are better prepared even before you arrive at the hospital.Helps you build your own blood donor network from your own contact database. No one cares more about you than your family and friends, so there is a high probability that one of them can step up for you.It is actively training/building a first responder network so that some one who has a bit of training in CPR, trauma can step up and help the citizen in distress before the Ambulance arrives.CallAmbulance App provides your family with a single link by which they can track the progress on the emergency incident.Preparedness is of great value in emergency care. You can look up nearest hospitals, diagnostics, pharmacies on this app.App also allows you to upload your health records so that you have all of them at a single place in the event of emergency.What more, In an attempt to ensure the emergency app is useful to every citizen in India it rolled out all the Indian languages in a phased manner.Luxlite app :Lux is a third-party app that allows you to easily calibrate your phone’s brightness sensor, saving you battery power and reducing eye strain if your phone is normally too bright in dark rooms.Lux isn't your ordinary brightness app. It intelligently adjusts the brightness of your display based on the environment you're in. If you step into a dimly lit room, Lux will automatically lower the brightness of your display to make it not only comfortable to read, but to also preserve battery power.SBINoQueue app :State Bank NO Queue is a unique app to enable customers to book a virtual Queue Ticket (e-Token) for select services at select SBI branches. Customers can generate e-Token before signNowing the branch, thus avoiding waiting in the queue at the branch and saving valuable time. The app also conveys the estimated waiting time, number of customers ahead and a map showing the direction to signNow the branch. Customers will be updated about their position in the queue through instant alerts.ES file explorer app :ES file explorer (file manager) is free, safe, simple and manage your files efficiently and easily. It is a full-featured file (images, music, movies, documents, app) manager for both local and networked use. It helps manage your android phone and files efficiently and effectively and share files without data cost.Diskusage app :Disk usage provides a way to find files and directories on storage card which consume a lot of space. Displays diagram with directories/sub directories proportional to their size.CamScanner app :CamScanner helps you scan, store, sync and collaborate on various contents across smartphones, tablets and computers.Its main features are mobile scanner, optimize scan quality, quick search, extract texts from image, share PDF/JPEG files, print & fax, collaboration, advanced editing, secure important docs and sync across platforms.Connect2 app :Use Connect2 to automatically copy or move photos, music, videos and other files between your phone and PC. Connect2 will automatically connect your devices too, so you can instantly start moving content between them.The wireless technology of Connect2 automatically connects your devices together with no WIFI LAN or cellular data network required. Transfer huge files securely and easily. Connect2 has a transfer resume feature that will reconnect your devices in the event of a failure, so if your transfer stops, be patient, it will resume.Greenify app :Greenify helps you identify and put the misbehaving apps into hibernation when you are not using them, to stop them from lagging your device and leeching the battery, in a unique way. They can do nothing without explicit launch by you or other apps, while still preserving full functionality when running in foreground, similar to iOS apps.Inshorts app :Inshorts is a news app that selects latest and best news from multiple national and international sources and summarizes them to present in a short and crisp 60 words or less format, personalized for you, in both, English or Hindi. All summarized stories contain only headlines and facts, no opinions, to help you stay informed of the current affairs. Whether it’s the latest government policies or shakeups in Bollywood, it gets them covered and delivered super fast. Get updated with the latest news and current affairs in a jiffy.Nova Launcher app :Nova launcher is the top launcher for modern Android, embracing full material design throughout. Nova Launcher replaces your home screen with one you control and can customize. Change icons, layouts, animations and more.Google Allo app :Google Allo, a smart messaging app that helps you say more and do more. Express yourself better with stickers, doodles, and huge emojis & text. Allo brings you the Google Assistant. Respond to messages without typing a single word. Smart reply learns over time and suggests responses to text and photos, in your style.AccuWeather app :AccuWeather offers the weather with same superior accuracy and great experience across all android smartphones and tablets, and android wear. It supports android wear, this free app also features the new AccuWeather minute cast, the leading minute-by-minute precipitation forecast, hyper-localized to your exact street address.Forest app :Have you ever been addicted to your phone and just cannot put it down ? Forest provides an interesting solution to beat your phone addiction. You can plant a seed in Forest. In the following time, this seed will gradually grow into a tree. However, if you cannot resist the temptation and leave this app to check Facebook or play a game, your tree will wither away. With this interesting mechanism, the sense of achievement and responsibility will drive the users to stay away from their phone with no pain.Pocket app :Pocket is your place to quickly save, discover, and recommend the best, most interesting stories on the Web.Duolingo app :Practice your speaking, reading, listening and writing skills while playing a game. You'll improve your vocabulary and grammar skills by answering questions and completing lessons. Start with basic verbs, phrases, and sentences, and learn new words daily.Duo lingo is changing the way people learn languages.• It's free, for real.• It's fun. Advance by completing bite-sized lessons, and track your progress with shiny achievements.• It's effective. 34 hours of Duo lingo are equivalent to a semester of university-level education.Evernote app :Ever note gives you the tools you need to keep your work effortlessly organized:Write, collect and capture ideas as searchable notes, notebooks, checklists and to-do lists.Take notes in a variety of formats, including: text, sketches, photos, audio, video, PDFs, web clippings and more.Use camera capture to easily scan and comment on pieces of paper, including printed documents, business cards, handwriting and sketches.Attach Microsoft Office docs, PDFs and photos. Organize your receipts, bills and invoices.Use Ever note as a digital notepad and easy-to-format word processor for all your thoughts as they come.Speechnotes app :Voice typing and taking notes, has never been so efficient and easy. Patent pending voice & punctuation keys-commands combo. Powerful speech-enabled (voice-typing) notepad, designed to empower your ideas and creativity.Bharat Ke Veer app : (Translation : Brave hearts of India app)Link : Bharat Ke Veer - Android Apps on Google PlayThis app has army heroes and their extra ordinary tales of bravery who live far from home and loved ones. These heroes sacrificed their own lives, so that the entire nation can sleep in peace. You can donate Rs.10 to Rs.15 lakhs, directly to individual brave heart's account or may donate to the "Bharat Ke Veer" (Translation : Brave hearts of India) corpus.Official Website : https://bharatkeveer.gov.in/inde...Note : There is no official app for “Bharat ke veer” (Translation : Brave hearts of India) as yet. This app is providing a way to redirect to that website inside the app and the process remains the same for payments. So, those who can't take the pain of going to website & do the payments, this app might help them handy.Felt like i missed anything ?Yeah. I remember. How can i forget the platform that you got to know about all these useful stuff ?Yeah. It’s Quora. Smartphone user can’t be smart without it !Quora app :Need any introduction ?Ok. For those who don’t know, Quora is a question and answer platform that empowers people to share and grow the world’s knowledge. People come to Quora to ask questions about any subject, read high quality knowledge that's personalized and relevant to them, and share their own knowledge with others. Quora is a place to share knowledge and better understand the world.You asked for 10. I gave 20. Enjoy ! :)Meanwhile quorans,Me : Oh my sachin ! What happened ?Quorans : No words to thank you bro. We regret that we don't know you all these days. We owe a lot to you bro !Me : Oh come on ! It’s okay. We live in the same home called earth and we have to help each other in our home right. Thanks for your love & kindness. :)Quorans : *in happy tears*Me : Still, what are you waiting for ! You want me to come & install ? Sorry, it's already 2 A.M. I have to go into my dream world. Now, wipe your tears. Say louder *Hail Quora* ! :)Quorans : *shouts* Hail Quora ! :)Thanks for your time :)Source : Google, Google Playstore, Blogs, etc.40 Best Free Android AppsP.S : Most of the apps are free and handy. In some applications, if you want to get the extra features, subscribe for premium membership. The more you explore, the more you love them.Originally answered : Vamsi Krishna Namala's answer to What are some must have Android apps?

There are a plenty of projects for beginners.You can find complete list here : karan/ProjectsSome categories in which above link have projects :NumbersClassic AlgorithmsGraphData StructuresTextNetworkingClassesThreadingWebFilesDatabasesGraphics and MultimediaSecurityNumbersFind PI to the Nth Digit - Enter a number and have the program generate PI up to that many decimal places. Keep a limit to how far the program will go.Find e to the Nth Digit - Just like the previous problem, but with e instead of PI. Enter a number and have the program generate e up to that many decimal places. Keep a limit to how far the program will go.Fibonacci Sequence - Enter a number and have the program generate the Fibonacci sequence to that number or to the Nth number.Prime Factorization - Have the user enter a number and find all Prime Factors (if there are any) and display them.Next Prime Number - Have the program find prime numbers until the user chooses to stop asking for the next one.Find Cost of Tile to Cover W x H Floor - Calculate the total cost of tile it would take to cover a floor plan of width and height, using a cost entered by the user.Mortgage Calculator - Calculate the monthly payments of a fixed term mortgage over given Nth terms at a given interest rate. Also figure out how long it will take the user to pay back the loan. For added complexity, add an option for users to select the compounding interval (Monthly, Weekly, Daily, Continually).Change Return Program - The user enters a cost and then the amount of money given. The program will figure out the change and the number of quarters, dimes, nickels, pennies needed for the change.Binary to Decimal and Back Converter - Develop a converter to convert a decimal number to binary or a binary number to its decimal equivalent.Calculator - A simple calculator to do basic operators. Make it a scientific calculator for added complexity.Unit Converter (temp, currency, volume, mass and more) - Converts various units between one another. The user enters the type of unit being entered, the type of unit they want to convert to and then the value. The program will then make the conversion.Alarm Clock - A simple clock where it plays a sound after X number of minutes/seconds or at a particular time.Distance Between Two Cities - Calculates the distance between two cities and allows the user to specify a unit of distance. This program may require finding coordinates for the cities like latitude and longitude.Credit Card Validator - Takes in a credit card number from a common credit card vendor (Visa, MasterCard, American Express, Discoverer) and validates it to make sure that it is a valid number (look into how credit cards use a checksum).Tax Calculator - Asks the user to enter a cost and either a country or state tax. It then returns the tax plus the total cost with tax.Factorial Finder - The Factorial of a positive integer, n, is defined as the product of the sequence n, n-1, n-2, ...1 and the factorial of zero, 0, is defined as being 1. Solve this using both loops and recursion.Complex Number Algebra - Show addition, multiplication, negation, and inversion of complex numbers in separate functions. (Subtraction and division operations can be made with pairs of these operations.) Print the results for each operation tested.Happy Numbers - A happy number is defined by the following process. Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. Those numbers for which this process ends in 1 are happy numbers, while those that do not end in 1 are unhappy numbers. Display an example of your output here. Find first 8 happy numbers.Number Names - Show how to spell out a number in English. You can use a preexisting implementation or roll your own, but you should support inputs up to at least one million (or the maximum value of your language's default bounded integer type, if that's less). Optional: Support for inputs other than positive integers (like zero, negative integers, and floating-point numbers).Coin Flip Simulation - Write some code that simulates flipping a single coin however many times the user decides. The code should record the outcomes and count the number of tails and heads.Limit Calculator - Ask the user to enter f(x) and the limit value, then return the value of the limit statement Optional: Make the calculator capable of supporting infinite limits.Fast Exponentiation - Ask the user to enter 2 integers a and b and output a^b (i.e. pow(a,b)) in O(lg n) time complexity.Classic AlgorithmsCollatz Conjecture - Start with a number n > 1. Find the number of steps it takes to signNow one using the following process: If n is even, divide it by 2. If n is odd, multiply it by 3 and add 1.Sorting - Implement two types of sorting algorithms: Merge sort and bubble sort.Closest pair problem - The closest pair of points problem or closest pair problem is a problem of computational geometry: given n points in metric space, find a pair of points with the smallest distance between them.Sieve of Eratosthenes - The sieve of Eratosthenes is one of the most efficient ways to find all of the smaller primes (below 10 million or so).GraphGraph from links - Create a program that will create a graph or network from a series of links.Eulerian Path - Create a program which will take as an input a graph and output either a Eulerian path or a Eulerian cycle, or state that it is not possible. A Eulerian Path starts at one node and traverses every edge of a graph through every node and finishes at another node. A Eulerian cycle is a eulerian Path that starts and finishes at the same node.Connected Graph - Create a program which takes a graph as an input and outputs whether every node is connected or not.Dijkstra’s Algorithm - Create a program that finds the shortest path through a graph using its edges.Minimum Spanning Tree - Create a program which takes a connected, undirected graph with weights and outputs the minimum spanning tree of the graph i.e., a subgraph that is a tree, contains all the vertices, and the sum of its weights is the least possible.Data StructuresInverted index - An Inverted Index is a data structure used to create full text search. Given a set of text files, implement a program to create an inverted index. Also create a user interface to do a search using that inverted index which returns a list of files that contain the query term / terms. The search index can be in memory.TextFizz Buzz - Write a program that prints the numbers from 1 to 100. But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”. For numbers which are multiples of both three and five print “FizzBuzz”.Reverse a String - Enter a string and the program will reverse it and print it out.Pig Latin - Pig Latin is a game of alterations played on the English language game. To create the Pig Latin form of an English word the initial consonant sound is transposed to the end of the word and an ay is affixed (Ex.: "banana" would yield anana-bay). Read Wikipedia for more information on rules.Count Vowels - Enter a string and the program counts the number of vowels in the text. For added complexity have it report a sum of each vowel found.Check if Palindrome - Checks if the string entered by the user is a palindrome. That is that it reads the same forwards as backwards like “racecar”Count Words in a String - Counts the number of individual words in a string. For added complexity read these strings in from a text file and generate a summary.Text Editor - Notepad style application that can open, edit, and save text documents. Optional: Add syntax highlighting and other features.RSS Feed Creator - Given a link to RSS/Atom Feed, get all posts and display them.Quote Tracker (market symbols etc) - A program which can go out and check the current value of stocks for a list of symbols entered by the user. The user can set how often the stocks are checked. For CLI, show whether the stock has moved up or down. Optional: If GUI, the program can show green up and red down arrows to show which direction the stock value has moved.Guestbook / Journal - A simple application that allows people to add comments or write journal entries. It can allow comments or not and timestamps for all entries. Could also be made into a shout box. Optional: Deploy it on Google App Engine or Heroku or any other PaaS (if possible, of course).Vigenere / Vernam / Ceasar Ciphers - Functions for encrypting and decrypting data messages. Then send them to a friend.Regex Query Tool - A tool that allows the user to enter a text string and then in a separate control enter a regex pattern. It will run the regular expression against the source text and return any matches or flag errors in the regular expression.NetworkingFTP Program - A file transfer program which can transfer files back and forth from a remote web sever.Bandwidth Monitor - A small utility program that tracks how much data you have uploaded and downloaded from the net during the course of your current online session. See if you can find out what periods of the day you use more and less and generate a report or graph that shows it.Port Scanner - Enter an IP address and a port range where the program will then attempt to find open ports on the given computer by connecting to each of them. On any successful connections mark the port as open.Mail Checker (POP3 / IMAP) - The user enters various account information include web server and IP, protocol type (POP3 or IMAP) and the application will check for email at a given interval.Country from IP Lookup - Enter an IP address and find the country that IP is registered in. Optional: Find the Ip automatically.Whois Search Tool - Enter an IP or host address and have it look it up through whois and return the results to you.Site Checker with Time Scheduling - An application that attempts to connect to a website or server every so many minutes or a given time and check if it is up. If it is down, it will notify you by email or by posting a notice on screen.ClassesProduct Inventory Project - Create an application which manages an inventory of products. Create a product class which has a price, id, and quantity on hand. Then create an inventory class which keeps track of various products and can sum up the inventory value.Airline / Hotel Reservation System - Create a reservation system which books airline seats or hotel rooms. It charges various rates for particular sections of the plane or hotel. Example, first class is going to cost more than coach. Hotel rooms have penthouse suites which cost more. Keep track of when rooms will be available and can be scheduled.Company Manager - Create an hierarchy of classes - abstract class Employee and subclasses HourlyEmployee, SalariedEmployee, Manager and Executive. Every one's pay is calculated differently, research a bit about it. After you've established an employee hierarchy, create a Company class that allows you to manage the employees. You should be able to hire, fire and raise employees.Bank Account Manager - Create a class called Account which will be an abstract class for three other classes called CheckingAccount, SavingsAccount and BusinessAccount. Manage credits and debits from these accounts through an ATM style program.Patient / Doctor Scheduler - Create a patient class and a doctor class. Have a doctor that can handle multiple patients and setup a scheduling program where a doctor can only handle 16 patients during an 8 hr work day.Recipe Creator and Manager - Create a recipe class with ingredients and a put them in a recipe manager program that organizes them into categories like deserts, main courses or by ingredients like chicken, beef, soups, pies etc.Image Gallery - Create an image abstract class and then a class that inherits from it for each image type. Put them in a program which displays them in a gallery style format for viewing.Shape Area and Perimeter Classes - Create an abstract class called Shape and then inherit from it other shapes like diamond, rectangle, circle, triangle etc. Then have each class override the area and perimeter functionality to handle each shape type.Flower Shop Ordering To Go - Create a flower shop application which deals in flower objects and use those flower objects in a bouquet object which can then be sold. Keep track of the number of objects and when you may need to order more.Family Tree Creator - Create a class called Person which will have a name, when they were born and when (and if) they died. Allow the user to create these Person classes and put them into a family tree structure. Print out the tree to the screen.ThreadingCreate A Progress Bar for Downloads - Create a progress bar for applications that can keep track of a download in progress. The progress bar will be on a separate thread and will communicate with the main thread using delegates.Bulk Thumbnail Creator - Picture processing can take a bit of time for some transformations. Especially if the image is large. Create an image program which can take hundreds of images and converts them to a specified size in the background thread while you do other things. For added complexity, have one thread handling re-sizing, have another bulk renaming of thumbnails etc.WebPage Scraper - Create an application which connects to a site and pulls out all links, or images, and saves them to a list. Optional: Organize the indexed content and don’t allow duplicates. Have it put the results into an easily searchable index file.Online White Board - Create an application which allows you to draw pictures, write notes and use various colors to flesh out ideas for projects. Optional: Add feature to invite friends to collaborate on a white board online.Get Atomic Time from Internet Clock - This program will get the true atomic time from an atomic time clock on the Internet. Use any one of the atomic clocks returned by a simple Google search.Fetch Current Weather - Get the current weather for a given zip/postal code. Optional: Try locating the user automatically.Scheduled Auto Login and Action - Make an application which logs into a given site on a schedule and invokes a certain action and then logs out. This can be useful for checking web mail, posting regular content, or getting info for other applications and saving it to your computer.E-Card Generator - Make a site that allows people to generate their own little e-cards and send them to other people. Do not use Flash. Use a picture library and perhaps insightful mottos or quotes.Content Management System - Create a content management system (CMS) like Joomla, Drupal, PHP Nuke etc. Start small. Optional: Allow for the addition of modules/addons.Web Board (Forum) - Create a forum for you and your buddies to post, administer and share thoughts and ideas.CAPTCHA Maker - Ever see those images with letters a numbers when you signup for a service and then asks you to enter what you see? It keeps web bots from automatically signing up and spamming. Try creating one yourself for online forms.FilesQuiz Maker - Make an application which takes various questions from a file, picked randomly, and puts together a quiz for students. Each quiz can be different and then reads a key to grade the quizzes.Sort Excel/CSV File Utility - Reads a file of records, sorts them, and then writes them back to the file. Allow the user to choose various sort style and sorting based on a particular field.Create Zip File Maker - The user enters various files from different directories and the program zips them up into a zip file. Optional: Apply actual compression to the files. Start with Huffman Algorithm.PDF Generator - An application which can read in a text file, html file or some other file and generates a PDF file out of it. Great for a web based service where the user uploads the file and the program returns a PDF of the file. Optional: Deploy on GAE or Heroku if possible.Mp3 Tagger - Modify and add ID3v1 tags to MP3 files. See if you can also add in the album art into the MP3 file’s header as well as other ID3v2 tags.Code Snippet Manager - Another utility program that allows coders to put in functions, classes or other tidbits to save for use later. Organized by the type of snippet or language the coder can quickly look up code. Optional: For extra practice try adding syntax highlighting based on the language.DatabasesSQL Query Analyzer - A utility application which a user can enter a query and have it run against a local database and look for ways to make it more efficient.Remote SQL Tool - A utility that can execute queries on remote servers from your local computer across the Internet. It should take in a remote host, user name and password, run the query and return the results.Report Generator - Create a utility that generates a report based on some tables in a database. Generates a sales reports based on the order/order details tables or sums up the days current database activity.Event Scheduler and Calendar - Make an application which allows the user to enter a date and time of an event, event notes and then schedule those events on a calendar. The user can then browse the calendar or search the calendar for specific events. Optional: Allow the application to create re-occurrence events that reoccur every day, week, month, year etc.Budget Tracker - Write an application that keeps track of a household’s budget. The user can add expenses, income, and recurring costs to find out how much they are saving or losing over a period of time. Optional: Allow the user to specify a date range and see the net flow of money in and out of the house budget for that time period.TV Show Tracker - Got a favorite show you don’t want to miss? Don’t have a PVR or want to be able to find the show to then PVR it later? Make an application which can search various online TV Guide sites, locate the shows/times/channels and add them to a database application. The database/website then can send you email reminders that a show is about to start and which channel it will be on.Travel Planner System - Make a system that allows users to put together their own little travel itinerary and keep track of the airline / hotel arrangements, points of interest, budget and schedule.Graphics and MultimediaSlide Show - Make an application that shows various pictures in a slide show format. Optional: Try adding various effects like fade in/out, star wipe and window blinds transitions.Stream Video from Online - Try to create your own online streaming video player.Mp3 Player - A simple program for playing your favorite music files. Add features you think are missing from your favorite music player.Watermarking Application - Have some pictures you want copyright protected? Add your own logo or text lightly across the background so that no one can simply steal your graphics off your site. Make a program that will add this watermark to the picture. Optional: Use threading to process multiple images simultaneously.Turtle Graphics - This is a common project where you create a floor of 20 x 20 squares. Using various commands you tell a turtle to draw a line on the floor. You have move forward, left or right, lift or drop pen etc. Do a search online for "Turtle Graphics" for more information. Optional: Allow the program to read in the list of commands from a file.GIF Creator A program that puts together multiple images (PNGs, JPGs, TIFFs) to make a smooth GIF that can be exported. Optional: Make the program convert small video files to GIFs as well.SecurityCaesar cipher - Implement a Caesar cipher, both encoding and decoding. The key is an integer from 1 to 25. This cipher rotates the letters of the alphabet (A to Z). The encoding replaces each letter with the 1st to 25th next letter in the alphabet (wrapping Z to A). So key 2 encrypts "HI" to "JK", but key 20 encrypts "HI" to "BC". This simple "monoalphabetic substitution cipher" provides almost no security, because an attacker who has the encoded message can either use frequency analysis to guess the key, or just try all 25 keys.

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