Touch Pianist - Play piano like a pro without playing piano.
EarMaster - Professional software for ear training and practical music theory on Windows and Mac.
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
lightnote - An interactive site to learn the basics of music theory 🎶
Meludia - Listening exercises and to sharpen your ear and music theory skills
Pianu - Learn to play the piano in your browser.