What a sad state. So many useful links cast to the wayside.

The MUD Connector <http://www.mudconnect.com/index.html>
Tolkien MUDs and other online games <http://www.lysator.liu.se/tolkien-games/mud.html>
TAPPED IN <http://www.tappedin.org/>
 

Lost Links

An Introduction to Multi-User Dimensions <http://www2.wku.edu/~blythsr/mud.htm>
The MUD Resource Collection <http://www.godlike.com/muds/>
Amberyl's Almost-Complete List of MUSHes <http://www.godlike.com/muds/muds.html> Delphi tutorials <http://members.nbci.com/sorien/tutorials.html>
NCTE Conversations: MUD Info <http://www.ncte.org/chat/mudinfo.html>
ncteMUD <http://www.ncte.org/chat/mudinfo.html>
NCTE Online Resort and Conference Center <http://www.ncte.org:7000/>
enCore open source moo project <http://lingua.utdallas.edu/encore/>
Project Achieve <http://achieve.utoronto.ca/>
Netoric (and Tuesday Cafe) <http://bsuvc.bsu.edu/~gsiering/netoric/>