SongMine - Songmine is a free online tool for discovering and recording chord progressions with your favorite DAW.
EarMaster - Professional software for ear training and practical music theory on Windows and Mac.
lightnote - An interactive site to learn the basics of music theory 🎶
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
FL Studio Mobile - Create & save multi-track music projects on a smartphone
Ear Teacher - Ear Teacher is a music theory and ear training application.