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.
Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
SunVox - SunVox is a small, fast and powerful modular synthesizer with pattern based sequencer (tracker).
Oceanaudio - Ocenaudio is a cross-platform, easy to use, fast and functional audio editor.
Cubasis - Cubasis is Steinberg’s streamlined, multitouch sequencer for the iPad.
GoldWave - GoldWave. Digital Audio Editing Software. Record • Restore • Convert • Analyze. Fully loaded to do everything from the simplest recording and editing to the most sophisticated audio processing, restoration, enhancements, analysis, and conversions.