deep voice solution:

1) free:
if you have a SoundBlaster Live sound card, or Audigy, there are built in hardware effects on sound card control panel, like convert female to male voice, i.e. make voice one octave lower. the reverse is also available, and many others. thus no software needed just set recording mode to "what you hear" in SB's mixer.

2) free:
send me sounds in .wav and I can make any effects with Cubase, if you tell me what you need... (even manage throat shape to alter voice)

(my microphone is crap, the old good one was crashed on a concert...)