The Verge on the eyeWriter inspired EyeCan from Samsung:
While controlling a mouse pointer with your eye isn’t brand-new technology, Samsung’s taking steps to get it in the hands of as many people as possible by open-sourcing its eyeCan technology. EyeCan was developed by five members of Samsung’s Creativity Lab, and was built with the purpose of helping those who are paralyzed from a disease like ALS control a computer through eye tracking. They’ve been testing it and posting videos of it in use on YouTube over the last few months (not surprisingly, one of those videos showed off a game of Angry Birds) and now the team is ready to release the software and documentation behind it for anyone to develop their own solution.
The Verge: Samsung releases source code for eyeCan, an eye-controlled mouse for the disabled
A Brain–Computer Interface Allows Paralyzed Patients to Play Music with Brainpower Alone