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.

PrimoMusic - An iTunes alternative made to manage iPhone/iPod media files

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

SoundBetter - Marketplace for musicians and music production professionals

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

Gemtracks - Buy instrumental backing tracks and beats for $149! Get master ownership and copyright transferred to you once purchased.