I use to sequence back in the day (Noisetracker, protracker, Octamed), was good times If you sail the high seas there's this: Amiga Mods Anthology - 4cds A massive 4 CDROM-Set, 18,000+ files (Protracker, S3M, XM, Amiga Synth...) Many, many, artist represented (with their OWN permission, info-files, pics and previously unreleased mods!) from the origins of the scene (Amiga days) on up to early 1996 featuring most of the best PC-Multichannel musicians. This CD is readable under all major platforms (MS-DOS, Win, Mac-os, UNIX, Amiga-DOS...)
Hope that is of use - would recommend most stuff Romeo Knight did, one of my fave scene musicians from back then
Edit: also found this collection of torrents, covering a 29gb base collection plus update torrents: http://tracker.modarchive.org/