Madtracker
Madtracker is the music composition tool that creates the shortest path between imagination and music. based on the tracker concept, madtracker provides a clean and intuitive interface for a powerful and efficient approach on making music. versatility and compatibility are guaranteed due to full vst and rewire support, while its pc charge is minimal.
http://www.madtracker.org/
Fast Tracker 2
Fast Tracker 2
http://www.starbreeze.com/
Buzz Tracker
Buzz Tracker
http://www.buzz2.com/
ModPlug Tracker
Modplug central is your portal into the free music subculture of the internet. you can download free music, and learn how to make music on your home computer, and download songs all for free!
http://www.modplug.com/
Noise Tracker
Noise Tracker
http://twnn.cjb.net/
Skale Tracker
Skale Tracker
http://www.skale.org/
Renoise
Streamline your workflow. produce quality music fast with renoise.
http://www.renoise.com/
ZTracker
Ztracker - a tracker-style midi sequencer.
http://ztracker.sourceforge.net/