myCompiler - Run your favourite programming languages online
Snipper.ml - A simple snippet manager in the menubar
CodeChef IDE - CodeChef IDE is a free online tool for developers helping them in writing codes and programs.
Kite - Kite helps you write code faster by bringing the web's programming knowledge into your editor.
Online Python - Online Python is a web application where you write codes in python language in the dedicated text space and the shell output is delivered to you in another text box on the right.
Devhints - TL;DR for developer documentation