Online Compiler / Interpreter

Visit http://www.ideone.com/
This is a free online compiler introduced and being developed by SPOJ team, a lots of thanks goes to them! and supports almost all available languages on SPOJ system.

So, if you are a C++ programmer, or like to learn some new esoteric or functional programming, or want to use gcc/g++ but don't have linux, or server side programming languages but don't want to setup a new IDE or virtual server, you can use this site... free for all!!!

Have fun...