RPGWorldModel is an object-oriented, abstract framework for creating world models for RPG/MMORPG games. It contains both high level, abstract objects as well as some basic implementation, but most important, it allows extentions to be made by developers!
Azmyth is intended to be a generic game framework used to create flexible RPG style games. Goals are to include base class library that will work for text, 2D and potentially 3D games using procedural content generation.
Fantasy World Simulation server compatibile with Eternal Lands(TM) Open Source client! The project community site is hosted at http://www.calindor.net.
SharpMud is a MUD server Framework written for .NET 2.0 in 100% C#. Provides an applcation layer that allows for MUD developers to focus on gameplay, not server mechanics. See the website for more information, including project status and direction.
A MUD server/library written in C#. Executable on any OS with the Microsoft .NET Framework installed. Featuring a completely object-oriented framework, It will be useable as a MUD server, or library to write another mud, client, or administration tool.