All programming sites at one place
General
Stackoverflow
Where developers learn, share their programming knowledge
Github
Build software better, together
GeeksforGeeks
A computer science portal for geeks
YouTube
Learn effeciently
Competetive Programming
Clist
A list and calender of all upcoming and ongoing programming contests
Codechef
A Platform for Aspiring Programmers
Codeforces
One of the best for competitive programming contests
Hackerrank
Focuses on competitive programming challenges for both consumers and businesses
HackerEarth
Enterprise software that helps organisations with their technical recruitment needs
Sphere Online Judge
Learn how to code and build efficient algorithms
Leetcode
Best platform to help you enhance your skills and prepare for technical interviews
Topcoder
A platform for competetive programming for experts
Google Coding competetions
Coding competetions held by Google
Project Euler
Mathematics for competetive programming
Web Development
W3schools
The world's largest web developer site
MDN web docs
Resources for developers, by developers
CSS - Tricks
Modern and advanced techniques for CSS form the developers
Can I use
Browser support tables for modern web technologies
Bootstrap
The world’s most popular front-end open source toolkit
Animate.css
Just-add-water CSS animations
NPM
A package manager for the JavaScript programming language
Yarn
A package manager that doubles down as project manager
Heroku
Learn about building, deploying, and managing your apps on Heroku
Netlify
Netlify is an all-in-one platform for automating modern web projects
Wordpress.org
WordPress is open source software you can use to create a beautiful website, blog, or app
Android/IOS App development
