Cainteoir Text-to-Speech is a GNOME/GTK+ GUI for the Cainteoir Text-to-Speech Engine. It allows you to listen to your documents or record them for use on the move using any of the eSpeak or MBROLA text-to-speech voices.
Enc2ly is a small tool for dumping musical information contained in an Encore binary file to a Lilypond text one. Encore is a popular music notation program from GVOX which uses a proprietary data format. Lilypond is a great music engraving system.