txtspeech is a Windows only Text to Speech application. It uses Microsoft's SAPI Technologies to speak whatever you enter into it's text box. The latest edition is 1.22 and is stable.

txtspeech 1.22.0 was released June 8, 2012 at 9:30 PM EST.

Creative Commons License
txtspeech by Cameron Ryan is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
Based on a work at sourceforge.net.