Pure Data - Pd (aka Pure Data) is a real-time graphical programming environment for audio, video, and graphical...
Linux Show Player - Sound player designed for stage productions
VCV Rack - A cross-platform modular synthesizer.
QLab - QLab, Live show control for Mac OS X.
SuperCollider - A real time audio synthesis engine, and an object-oriented programming language specialised for...
Cue Player - Cue Player software for theater sound and lighting