ZynAddSubFX - ZynAddSubFX is an open source software synthesizer for Linux, Mac OS X and Microsoft Windows.
MadMapper - The Mapping Software
Qsynth - Qsynth is a simple Qt4 application wrapper for the ...
Resolume - Resolume is an application for live video performances.
Surge XT - Open-source subtractive-hybrid synthesizer formerly sold commercially as Vember Audio Surge.
Linux Show Player - Sound player designed for stage productions