the brainfuck programming language   (link)

http://www.muppetlabs.com/~breadbox/bf/
Brainfuck is the ungodly creation of Urban Müller, whose goal was apparently to create a Turing-complete language for which he could write the smallest compiler ever, for the Amiga OS 2.0. His compiler was 240 bytes in size.

http://en.wikipedia.org/wiki/Brainfuck
http://cydathria.com/bf/bf_ex1.html