NiMUD is a periodically updated MUD software that has been in
production since 1992.  

It is released under the Artistic License 2.0 and its documentation,
help files, NIMscripts and area files are distributed under CCA-3.0
BY-SA licenses.  It was chiefly engineered by Locke, the pseudonym
of Herb Gilliland.  Parts of the editor are (c) 1993 Herb Gilliland
and Chris Woodward.  A long, long time ago (1993) it was based on
Merc 2.0c; and is released in good faith under its current licensing
conditions.

The Isles NiMUD, the origination point for OLC, is an expansive,
automated world full of interesting features.  Unlike many other
MUDs, The Isles NiMUD has a fully unique world with complex
interactions.  

Over 7 times the number of lines present in a Merc/Diku MUD, 
The Isles has a rich, unique and original code-base that contains
familiar commands common to many MUDs. 

-Hire a monk, fighter or ranger to assist you in your adventures

-Visit the deepest dungeons and highest mountains in your quest to
 acquire magic, power and notoriety

-Become a hero and commission your own castle to fight in an ongoing
 global conquest between like kingdoms

-Establish your name in history by defeating monsters and
 completing quests

-Cast powerful spells from a variety of different magick
 circles including necromancy, elemental magicks and
 natural magicks

-Explore hundreds of unique locations and the thousands of rooms
 while fighting, exploring and spelunking your way to treasure in
 a classic dungeon adventure

-Help build the world with a powerful modal OLC that has been used
 on thousands of online games and is refined by its surviving author

-Travel the seven seas and fight pirates or merchants in ongoing
 adventures you can share with your friends

-Group with like-minded adventurers and combine your assets to
 rule the realm and leave no stone unturned