NitroTracker is a FastTracker II style tracker for the Nintendo DS. NitroTracker is a versatile tool for creating music – everywhere! It supports the popular XM file format that is used by many PC trackers and that can be played on many PC audio players such as Winamp or XMMS. With NitroTracker, you can carry your XMs around in your DS and compose whenever and wherever you feel like it.

0xtob, the main-coder, will be still maintaining the project but with the step to go open source, he hopes that others jump into the boat and help to make NitroTracker even better!

News source: http://forum.gbadev.org/viewtopic.php?t=17200

http://code.google.com/p/nitrotracker/