QPointer Keyboard software enables keyboard only operation of a Windows
computer environment (mouseless operation).  

With QPointer running, the keyboard functioning as an absolute and relative
pointing device, in addition to providing keystroke input. It allows
operation of the whole computer without taking hands off the keyboard.  

With QPointer Keyboard software, a regular keyboard turns into a direct
pointing device and enables mouseless navigation without remembering long
lists of keyboard shortcuts. 

QPointer's technology enables identifying each object on the screen. It can
therefore directly "point" at each object by keyboard.  

A free demo is available at:
http://www.commodio.com/products_keyboard.html