I found this site about keygen music (more or less chiptune) and wanted to share with the community
All the music files are in .mid .mod .xm format and can be played using winamp. All the music files listed on site can also be found on this biiiiig pack containing 4500 tunes ~250MB download
I am not affiliated in any way with this site and I have no personal gain by sharing this so please don't mark this as spam :P
Also...never tried with the MIDI Plugin yet. Anyone willing to confirm if they work with that?
[EDIT] Also found this site: http://modarchive.org/
Not sure about copyright issues so use them at your own risk !!!