My favorite distributed genetic fractal visualization, ElectricSheep is now available as an android live wallpaper.
First created in 1999 by Scott Draves, the Electric Sheep is a form of artificial life, which is to say it is software that recreates the biological phenomena of evolution and reproduction though mathematics. The system is made up of man and machine, a cyborg mind with 450,000 participant computers and people all over the Internet.
via: Scottdraves.org