Arduino

Arduino is an open-source prototyping platform for building hardware devices. There is a Arduino programming language connected with it. Quite a number of devices have been created with this platform.

Links

 * Wikipedia article
 * Official site
 * Hackable Wise Clock
 * ClockTHREEjr
 * Arduino creator explains why open source matters in hardware, too
 * Arduino for Beginners, by John Baichtal
 * Daniel Reetz DIY Book Scanner Designs
 * Urban Armor: DIY wearable electronics