Algorithm Ink (playing with Javascript)
Aza Raskin ported Chris Coyne's Context Free to Javascript / Canvas.
The result, Algorithm Ink is dangerously fun. It uses a simple scripting language or design grammar called CFDG. It can use recursion and (pseudo-) random numbers to implement IFS fractal or fractal-like images.
Caveat: Canvas is (currently) only supported in Firefox 3 (Mozilla), Safari, and Opera. Sorry for anyone using Google Chrome or MS Internet Explorer.