Microcontrollers
Arduino Duemilanove
Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It's intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments. Provides 14 digital I/O pins, 6 of which can produce PWM signals, and 6 analog inputs.
LilyPad
The LilyPad Arduino is a microcontroller board designed for wearables and e-textiles. It can be sewn to fabric and similarly mounted power supplies, sensors and actuators with conductive thread.
ATMega 328
Use for your own designs or as a replacement to the Arduino Dueliminove.