Open Source Stepper Motor Drivers
- Pololu Stepper Motor Drivers - 2.2A with heat sink - [1]
- TinyG - 2.5A - [2]. $129 off shelf - [3]
- StepStick from RepRap project - [4]
- Big Easy by Brian Schmalz - from Sparkfun - 2A - Open Source Project - [5]
- Microcontroller based driver - 3A - AVRSTMD - [6]
- OThers from RepRap project - [7]
- From RepRap - 3D printer controller board with 5 stepper drivers at 1.9A - $250 - [8]