An Atlas of Cyberspaces - MUDs and Virtual Worlds - An atlas of maps and graphic representations of the geographies of the new electronic territories of the Internet, WWW and other emerging Cyberspaces.
The Center for Imaginary Environments - Supports reality modeling technology and multi-user environments. Members are active in the development of mud software using the LPC and Java languages.
Code begets community - Information about Daniel Pargman's Ph.D. thesis on the social and technical aspects of managing a virtual community, a study of a Swedish MUD. Sample chapters in PDF format.
DikuMUD Family Tree - Listing of MUD codebases by heirachy for Diku and all code bases.
Intermud Protocols - An overview of the protocols that connect different MUDs together, providing intermud chat-channels and other information.
Journal of Virtual Environments - Academic journal devoted to MUDs and their uses. Formerly known as the Journal of MUD Research.
The MUD2 Archives - Collected stories, poetry and memories from the VAX and later incarnations of MUD2.
MUDdy Waters - Detailed information about the MUDding community. Features reviews, resources and message boards.
MUSE Ltd. - Purveyors of fine, online games since 1985; principal products are MUD2 and the MUDDLE programming language and development system, both available for commercial licensing.
Richard A. Bartle: Players Who Suit MUDs - Discusses whether MUDs are games, pass times, sports or entertainments and suggests four kinds of player: achiever, explorer, socializer or killer.
Vae Victus - Contains news, logs, history, and a message board.