Fluid for Sketch - Sketch plugin to make your responsive designs more efficient
myCompiler - Run your favourite programming languages online
Anima App - Design, get feedback, convert to code, publish, iterate.
CodeChef IDE - CodeChef IDE is a free online tool for developers helping them in writing codes and programs.
Git Sketch Plugin - Version control for designers
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.