VCV Rack - A cross-platform modular synthesizer.
Auxy Music Studio - Auxy brings real music creation to iPhone in a simple and inspiring format.
Pure Data - Pd (aka Pure Data) is a real-time graphical programming environment for audio, video, and graphical...
nlog Synth - Professional Virtual Analogue Synthesizer ::: check nlogmusic at YouTube :::
Voltage Modular - Virtual modular platform designed for flexibility and pro sound
cassini - Polyphonic Synthesizer for iPhone/iPod touch