On Monday, 12 March 2012 at 01:28:39 UTC, H. S. Teoh wrote:
Something that not only doesn't need the mouse, but *eradicates* allneed for the mouse on virtually all applications.
It isn't what you described, but in X11, if you hit shift+numlock, it toggles a mode that lets you move the cursor and click by using the numpad keys.