Electric Sheep

Electric Sheep are fractal images that morph into other fractal images, partly based on input we provide. Electric Sheep is an open source project which uses your computer's CPU when it isn't working. It uses it to take two images and create a third. Genetics plays a part, but a real geneticist would have to explain it. Everything is available under the GNU Free Documentation License. These images are popularly used as wallpaper. [from CNET News.com]