Tynker - Game Worlds for Kids to Learn Programming
Rosetta Code - Rosetta Code is a programming resource that provides example problems of how to write the same...
CodeCombat - Learn programming with a multiplayer live coding strategy game.
Programmr - At Programmr you can code, compile & run your programs directly in the browser.
StackHive - Design, develop or publish websites right from your browser
AlgoExpert.io - A better way to prep for tech interviews