TetraMouse dual joysticks that may be operated using the lips, chin, tongue, fingers or toes

The two TetraMouse models consist of dual joysticks that may be operated using the lips, chin, tongue, fingers or toes. The joystick on the right controls the mouse pointer movement and is also used to change settings when in program mode, while the left joystick provides up to 8 buttons (left, right, middle and mouse buttons 4 through 8), left, right and middle button click and hold (drag and drop) functions, scrolling and auto repeat scrolling, and user-controlled programming functions. The TetraMouse models are standard USB mice, which means they will work on any computer, AAC device, security system, or other devices capable of supporting a USB mouse input with no need to install any software.

http://tetramouse.com/