OpenMPT - OpenMPT is a popular tracker software for Windows.
SunVox - SunVox is a small, fast and powerful modular synthesizer with pattern based sequencer (tracker).
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.
PxTone Collage - A music editing software, capable of using common sounds, custom sounds, and everything in between to make surprisingly good music. Originally in Japanese, but easily fixed.
MOTU Digital Performer - Get inspired, then refine your mix — all in a singular workflow.
Schism Tracker - Schism Tracker is a free reimplementation of Impulse Tracker, a program used to create high quality...