keezy - A colorful soundboard. Play with music.
EarMaster - Professional software for ear training and practical music theory on Windows and Mac.
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
GNU Solfege - GNU Solfege is free music education software.
Aftertouch - Aftertouch – 3D MIDI Controller created and published by Kevin Nelson.
Perfect Ear - A simple yet advanced application for improving your solfege skills.