Vvvv - vvvv is a graphical programming environment for easy prototyping and development.
VCV Rack - A cross-platform modular synthesizer.
Processing - C++ and Java programming at the speed of thought.
Pure Data - Pd (aka Pure Data) is a real-time graphical programming environment for audio, video, and graphical...
Vuo - Design and build live interactive media.
Voltage Modular - Virtual modular platform designed for flexibility and pro sound