VCV Rack - A cross-platform modular synthesizer.

FamiStudio - FamiStudio is very simple music editor for the Nintendo Entertainment System or Famicom. It is designed to be easier to use than FamiTracker, but its feature set is also much more limited.

Pure Data - Pd (aka Pure Data) is a real-time graphical programming environment for audio, video, and graphical...

SunVox - SunVox is a small, fast and powerful modular synthesizer with pattern based sequencer (tracker).

miRack - Eurorack-style modular synthesizer for iOS.

Cubasis - Cubasis is Steinberg’s streamlined, multitouch sequencer for the iPad.