Sonic Pi - Sonic Pi is a new kind of instrument for a new generation of musicians. It is simple to learn, powerful enough for live performances and free to download.
Ocean beta - Make music with friends in your browser
SuperCollider - A real time audio synthesis engine, and an object-oriented programming language specialised for...
iO-808 - Rhythm composer modeled after Roland's TR-808 drum machine.
ChucK - A strongly-timed music programming language
Cameo - Book personalized video shoutouts from your favorite people