Midi Studio - Full-featured, modular MIDI control surface for iOS
ZynAddSubFX - ZynAddSubFX is an open source software synthesizer for Linux, Mac OS X and Microsoft Windows.
Navichord - Intuitive chord sequencer and MIDI controller for iOS
Surge XT - Open-source subtractive-hybrid synthesizer formerly sold commercially as Vember Audio Surge.
IsoPad - IsoPad lets you use your Windows tablet to play electronic MIDI instruments.
Qsynth - Qsynth is a simple Qt4 application wrapper for the ...