Cool Screen Saver - Electric Sheep

Electric Sheep is a free, open source screen saver run by thousands of people all over the world. It can be installed on any ordinary PC or Mac. When these computers "sleep", the screen saver comes on and the computers communicate with each other by the internet to share the work of creating morphing abstract animations known as "sheep".

This program is recommended only if you have a high-bandwidth, always-on connection to the internet such as DSL or cable modem. For best results, let it run overnight to collect a whole flock. Laptop users might have to adjust their power settings to accomplish this.