Footime Foot Mouse
Footime™ Foot Mouse allows those with hand, arm, or shoulder injuries to operate computers by foot. This two-part input device (a slipper controller and a pedal for mouse clicks, scrolling and shortcuts) can replace your mouse or work in conjunction. Ergonomic layout of pedals and efficient controlling make it easy to use. Compatible with Mac and PC.
More information: http://www.alimed.com/footime-foot-mouse.html