YASSE is intended as a script engine among other accessories for the Simutronics games however it can be easily modified to adapt for almost any other MUD game system. The bulk of it was intended for the DragonRealms game http://www.dragonrealms.net/
Pangaea will be a robust and feature filled game engine built using Allegro (http://alleg.sourceforge.net) It will be similar to Final Fantasy 1-3, etc., complete with map editor/world builder.
MUSHUnformat is a MUSHcode unformatter written for Mac OS X. It is based on the same rules as Andrew Molitor's 'amolitor.c' unformatting program. However, unlike most other *NIX unformatters, this one has a pretty GUI to go with it.