Perfect Ear - A simple yet advanced application for improving your solfege skills.
EarMaster - Professional software for ear training and practical music theory on Windows and Mac.
GNU Solfege - GNU Solfege is free music education software.
GitHub Audio - Tracks events across GitHub to generate calming work music
ToneScholar - Train your ears and improve your musicianship with the best functional ear training app for musicians
Meludia - Listening exercises and to sharpen your ear and music theory skills