AxTk is a toolkit for building highly accessible applications with speech output. AxTk is built on top of wxWidgets and so is cross-platform. The developer can opt to speech-enable an existing wxWidgets UI, or use a new menu-based interface which is easier for a vision impaired user.
AxTk also contains a text to speech wrapper class, wxTextToSpeech, with handlers for a variety of speech engines including SAPI, Mac Speech Synthesis Manager, eSpeak and Cepstral. wxTextToSpeech can be used independently of the rest of AxTk.
You can discuss AxTk on the axtk-dev@googlegroups.com mailing list, here:
http://groups.google.com/group/axtk-dev
You can get the latest source from SVN, or a snapshot including the HTML documentation from http://www.anthemion.co.uk/axtk/. If unzipping a zip archive on Unix, use unzip -a to convert line endings.
For more information, please see the FAQ.