3D Printer
From PROBOTIX :: wiki
http://www.reactivesubstance.com/step.html
http://www.shapeoko.com/wiki/index.php/Parts
http://www.panucatt.com/product_p/ag1cnc.htm
https://github.com/modmaker/BeBoPr/wiki/Stepper-Drivers
https://github.com/modmaker/BeBoPr/wiki/BeBoPr-does-Black
http://bb-lcnc.blogspot.com/2013/08/bebopr-boards-available-online.html
http://www.pololu.com/catalog/category/120
http://reprap.org/wiki/RepRapDiscount_Smart_Controller