OptiKey is a free and Open Source eye-gaze software suite which provides both text-to-speech for communication and full access to the keyboard and mouse. It supports the new generation of cheap eye gaze devices such as those from Tobii Gaming .
The application is updated regularly and supports many languages - recent work includes support for symbol keyboards based on the CommuniKate project - opening up the application to non literate users and a much wider usergroup.
OptiKey will work with any eye tracker, mouse or access device which allows cursor control - including free head tracking mice which use standard webcams - see the related downloads at the base of this page.
OptiKey was recently forked to create Eye Mine from Special Effect which provides a fantastic way to play Minecraft using Eye Gaze devices.