repl.it : Powerful and simple online compiler, IDE, interpreter, and REPL. Code, compile, and run code in 30+ programming languages. including JavaScript, Pytho...
ideone.com : Ideone is an online compiler and debugging tool which allows youto compile source code and execute it online in more than 60 programming languages.
Cappuccino : Cappuccino is a framework which makes it easy to create advanced web apps. With just a few lines of code you can have an app built with full undo and ...
SumoPaint : Powerful graphics editor for your web browser and pc
Snippely : Snippely is a basic text and code organizational tool. Instead of storing bits of code, quick notes, and memos in text files all over your hard drive,...