EyeWrite

An application that lets you write with your eyes by "drawing" letter-like figures with your eyes, similar to writing on mobile phones and palm-pilots by drawing letters with a stylus pen.

Category Human Computer Interaction
Developer Jacob O. Wobbrock at the University of Washington, USA.
Requirements Tobii Pro eye tracker, Windows, .NET framework and a way to control the mouse cursor with the eye tracker (try the ETU-driver).
Tobii Test Tobii test.
Price and Support Free application with no support.
Download Developer's site.