Well at least in the world of 8bc and gameboy music…it seems not alot of people have heard of tracker and Hively Tracker for the amiga! There are alot of great tunes in .ahx and .hvl format! AHX was written originally to create a SID-like sound on the amiga. In other words, its an early soft-synth of sorts! It has four channels, and all the SID waveforms are supported, and it has filters too I believe. HivelyTracker is sort of an extended version, supporting up to 16 channels!
You can listen to .ahx and .hvl with XMplay or winamp on windows! Just find the plugins.
If you have linux i would get this command line replayer!
OS X, go with audio overload!
Tunes:
