1. Ardunio
http://www.arduino.cc/
http://www.adafruit.com/category/17
2. Raspberry Pi
http://www.raspberrypi.org/
http://www.adafruit.com/category/105
3. BeagleBone
http://beagleboard.org/Products/BeagleBone
http://www.adafruit.com/category/75
Tutorial on how to use BeagleBone
http://www.adafruit.com/blog/2013/07/29/tutorial-introduction-to-the-beaglebone-black-device-tree/
That’s all!
Deaf Dave.