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.
PuPHPet : A simple GUI to set up virtual machines for Web development.
Rove : Rove.io is a service that allows you to pregenerate typical Vagrant builds.
supercollider : SuperCollider is an environment and programming language for real time audio synthesis and algorithmic composition. It provides an interpreted object-...