FAMITRACKER, create chiptune in your PC for FREE!!!
FamiTracker is a free windows tracker for producing music for the NES/Famicom-systems. The interface is based on MadTracker and should be easy to use if you've been using trackers before.One of the features is NSF-file exporting. That allows music created in this tracker to be played on the real hardware, or even for for use in your own NES-applications. Some other features: