Text to Speech Maker is made by Xrlly Software. It will convert text to a variety of audio formats such as wav,mp3,vox files. You can get a free trial from http://www.xrlly.com/text-to-speech.htm.

Balabolka is a Text-To-Speech (TTS) program. All computer voices installed on your system are available to Balabolka. The on-screen text can be saved as a WAV or MP3 file. ... Balabolka uses various versions of Microsoft Speech API (SAPI); [you can] alter a voice's parameters, including rate and pitch. It can be downloaded from http://www.cross-plus-a.com/balabolka.htm

For more information on other Text-to-Speech programs, check out the Text To Speech Tools mini guide by Robin Good.