"Does anyone know of any free voice recognition software?"

Windows Vista (and presumably Windows 7) has voice recognition built in - although you have to dig around a bit to activate it (I can't remember the details at the moment). I have DNS on my laptop, and I'm not terribly impressed with it, but I have recently launched the Windows software on my Vista desktop and it seems to work better than the DNS on the other machine. I think that voice recognition was also available on XP, but you needed to have access to the original disk.