Game Commander for Unreal Tournament is a full-powered version of the
 award-winning Game Commander voice control software for games and
 simulations. Change weapons, send taunts, initiate fancy moves, all
 with the sound of your voice. And with no voice training! Game
 Commander for Unreal Tournament supports full macros of up to
 256-keystrokes per voice command, just like the full version.
 "I give Game Commander a big thumbs-up," Cliff Bleszinski, lead
 designer of Unreal Tournament for Epic Games. Free for private,
 individual use.

WARNING:
Does not work in Windows XP/2000/NT...or 
at least I couldn't get it too :(