Assuming iPhone apps count as well, check out Dragon Dictation for the iPhone. It provides better voice recognition on the iPhone that is far superior to anything I have seen on the Mac and it is FREE. The actual voice to text conversion is done on their servers not on the iPhone itself so if you happen to be running on Edge it can be a tad slow, but with a WiFi connection it is almost instantaneous. A very impressive little app.
Caution: It does capture the names (only the names) from your Contacts to improve voice recognition.
