G.S.T. BBS v6.0 by Gut Soft - Written by Guy and Serge Turgeon. Nice little (complete) BBS system that can run off a single 1541 floppy drive. Docs are on the disk but you'll need to run the 'GST BBS Edit' first to create some relative files the main program needs. Big thanks to DLH of bombjack.org for finding this.

Found this great blog post with more info about the BBS and instructions on how to set it up in VICE 3.6.