VoiceCode is an Open Source initiative started by the National Research Council of Canada, to develop a programming by voice toolbox. The aim of the project is to make programming through voice input as easy and productive as with mouse and keyboard.
For install, Use subversion, as described in this page: http://sourceforge.net/apps/mediawiki/voicecode/index.php?title=VCode_1_Doc/InstallationManual.
This project implemented some awesome features. Unfortunately, it appears to be living-dead software, slowly rotting, and without any maintainers. As of December 2014, it does not work with the 2012+ versions of the associated speech recognizer.