EarMaster - Professional software for ear training and practical music theory on Windows and Mac.
GNU Solfege - GNU Solfege is free music education software.
Meludia - Listening exercises and to sharpen your ear and music theory skills
ToneScholar - Train your ears and improve your musicianship with the best functional ear training app for musicians
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
Ear Teacher - Ear Teacher is a music theory and ear training application.