Allan Kent, DMXzone Flash and PHP tutorial author, found Skipper at Sourceforge (the place to be if you're into OpenSource stuff, and not only for Linux - much of it has Windows versions too).
Skipper allows you to build very cheap sensors, has a program to translate body movements picked up by those sensors into controls for programs, provides word predictors, dictionaries etc, and interacts with screenreaders. And it's free!
George Petrov is a renowned software writer and developer whose extensive skills brought numerous extensions, articles and knowledge to the DMXzone- the online community for professional Adobe Dreamweaver users. The most popular for its over high-quality Dreamweaver extensions and templates.