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.
MOTU Digital Performer - Get inspired, then refine your mix — all in a singular workflow.
SunVox - SunVox is a small, fast and powerful modular synthesizer with pattern based sequencer (tracker).
Cubasis - Cubasis is Steinberg’s streamlined, multitouch sequencer for the iPad.
Serato Studio - Intuitive beat making software for beginners, DJs, and advanced producers. Spend less time hitting roadblocks and more time making music with Serato Studio.
Beat-J - Make beats and produce music tracks. Make your own cool tracks with BEAT J.