Bulletin Board System software has been available for a number of different platforms, what follows is a list of BBS software available for different operating systems. You may also want to look into
BBS Terminal Software as well as
BBS Door Software.
EditWindows
Synchronet
Mystic
EleBBSEditLinux/Unix
Synchronet
MBSEEditCommodore & Amiga
CNet Professional BBS
EditMac/OSX
EditApple
EditDOS
RemoteAccess