EarMaster - Professional software for ear training and practical music theory on Windows and Mac.

Pitch Ability Test - Test your Pitch Ability. Measure your pitch take over and pitch retention abilities. Know where you stand on the road to Absolute Pitch. Especially, measure the criteria: Accurately sing a named note without a reference.

Touch Pianist - Play piano like a pro without playing piano.

GitHub Audio - Tracks events across GitHub to generate calming work music

lightnote - An interactive site to learn the basics of music theory 🎶

LenMus - LenMus is a free program for learning music.