EarMaster - Professional software for ear training and practical music theory on Windows and Mac.
RapidComposer - MusicDevelopments RapidComposer: Music Prototyping and Automated Composition Software
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
Captain Chords - Write chord progressions in your favorite DAW
Ear Teacher - Ear Teacher is a music theory and ear training application.
Odesi - ODESI is a music sketchpad that exports your projects to Audio and MIDI.