Open Source Stepper Motor Controllers
- Zach Hoeken- 4.5A - http://www.hoektronics.com/2012/12/13/challenges-of-building-a-cnc-stepper-driver/
- Steppernug - 3.0A
- Pololu - 2A
- Powerlolu - 5A
- TinyG - 2.5A - Synthetos.com - Riley Porter and Alden Hart, DC area.
- GRBL Shield - 2.5A - Synthetos