Originally developed by Mustang Software, Wildcat was sold to Santronics in December 1998. Commercialware Originally called The Major BBS, Worldgroup is probably the most successfully made and sold commercially based BBS software. Its maker, Galacticomm, was sold in 1998 and the company has been reformed to netVillage. I am not sure if they are even selling Worldgroup or offereing support anymore. Worldgroup is probably the most popular pay-based BBS and is the most common among Telnettable BBSes.
Web based users can use a browser plug-in to get enhanced graphics.
Worldgroup is meant to be used as a professional system and carries with it a professional price tag. WWIV now supports multiple nodes and Fidonet message echos.