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. It is targeted at both chiptune artists and NES homebrewers.
Prototracker is a fakebit chiptune tracker that uses a single-oscillator synth with 256 preset waveforms. Macros are used to create instruments and keyboard shortcuts are similar to the familiar Protracker.
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.
The program is no longer updated. Last version, 0.4.6, released in February 2015, can be still downloaded from the official website.
ChibiTracker is not currently in development but downloads are still available from Freecode (http://freecode.com/projects/chibitracker) & SourceForge (https://sourceforge.net/projects/chibitracker.berlios).
Homepage not available. Development outdated.