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.
repl.it : Powerful and simple online compiler, IDE, interpreter, and REPL. Code, compile, and run code in 30+ programming languages. including JavaScript, Pytho...
SQLFormat : SQLFormat is a free online formatter for SQL statements.
Rove : Rove.io is a service that allows you to pregenerate typical Vagrant builds.
JSHint : This is JSHint, a tool that helps to detect errors and potential problems in your JavaScript code.
