eyewriter.

Tony Quan, aka Tempt1, is an artist, activist and graffiti writer. In 2003 he was diagnosed with ALS, and over the last seven years he has lost the ability to move, speak or even breathe on his own. But his mind and creative spirit remained intact. So last year the Brooklyn born Graffiti Research Lab, a group who's founding members are either professors or graduates of Parsons the New School for Design, spearheaded the Eyewriter project. They teamed up with OpenFrameworks and Free Art and Technology communities to build low cost, open source software and hardware that would allow Tempt1 to paint again through the use of eye tracking. Similar technology has allowed the physicist Stephen Hawkings to speak using only his eyes.
-NY Observer