Yeah there's one with fl studio,, have you got fl?
Are you using Windows, there's one in XP. I'm pretty sure you can get different voices for it, maybe worth a look?
The AT&T one on the net. I've used it for soundbites for mixes and radio shows.
http://www.research.att.com/~ttsweb/tts/demo.php
Found an absolutely sick one here.
http://cepstral.com/demos/
You can add an effect called Dizzy Droid onto the audio.
how could you guys forget shit-talker
http://unaesthetic.net/st/setupv12.exe
edit: seems it doesnt work under 64 bit though