MilkyTracker - MilkyTracker is an open source, multi-platform music application for creating .MOD and .
Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
OpenMPT - OpenMPT is a popular tracker software for Windows.
Oceanaudio - Ocenaudio is a cross-platform, easy to use, fast and functional audio editor.
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.
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.