Openservo.com

http://www.openservo.com/FrontPage
http://www.robotfuzz.com/index.php?main_page=product_info&cPath=66&products_id=181 OSIF usb to i2c interface, control openservo from usb port. 
http://www.phenostream.com/Products/OSM_01.aspx c Open stepper motor
Category:Robotics
Category:ESC control