Raspberry Pi — a tiny, stripped-down $35 computer — hit the market just one year ago. Since then, almost one million have been sold, becoming the DIY gadget-maker’s go-to device. Tinkerers, hobbyists, educators and students and basically anyone who likes to build things have taken to the internet with project after project utilizing Raspberry Pi.
http://www.treehugger.com/slideshows/gadgets/20-awesome-projects-raspberry-pi-microcomputers