Tento

Tento allows you to test code for your preferred language. Sometimes, when youre writing code you may want to test some code snippets without compiling (or running) the whole program. With Tento you can do all of this and more in a simple and intuitive way. Tento wont replace your IDE or your preferred text editor, it will complement your workflow! By default, Tento will detect and configure support for AppleScript, C# (mono), Erlang, Haskell, Java, JavaScript (node), Lua, Perl, PHP, Prolog (gplc), Python, Ruby, Scala and Shell, but you can add and configure your own languages. Tento does not ship with any compiler or interpreter as it uses those already installed on your system.