Chakshu is a freeware for the Visually Challenged. It is developed by me (Uday Trivedi) & Arindam Choudhury as M.Tech project at IIT Guwahati. The software features most of the standard functionalities required for the visually challenged to use a computing system.
The software can be downloaded from here.
Here are some more links to newspaper reports about Chakshu.