Some examples of the softs covered so far: Warp Six, Telegard, RATsoft, GBBS, etc.

How about Pyroto Mountain BBS? I think I run the only standalone copy left.

pyroto.mysticmountain.us port:8086

--- Mystic BBS v1.12 A46 2020/08/26 (Windows/32)
* Origin: Baud BBS (21:4/113)