Maximus is a bulletin board system, originally developed by Scott J. Dudley through his company, Lanius Corporation.

The software was first written and released for both MS-DOS and OS/2, with later versions supporting 32-bit Windows operating systems.

The source code for Maximus and its companion utilities, such as Squish, was released under the GNU General Public License in 2002.

With some effort, however, it is very customisable, including a provision for a system operator to supply RIP graphics for users.

Maximus has supported two independent programming languages for system operators to customise their BBS.