1. A strongly-timed, concurrent, and on-the-fly audio programming language

  2. 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.

  3. Overtone is an open source audio environment designed to explore new musical ideas from synthesis...

  4. Pd (aka Pure Data) is a real-time graphical programming environment for audio, video, and graphical...

  5. A real time audio synthesis engine, and an object-oriented programming language specialised for...

  6. SunVox is a small, fast and powerful modular synthesizer with pattern based sequencer (tracker).