Obsidian is an extensible virtual world system with a fullblown multiplayer client-server architecture. It is not a VRML2 world system, though there are plans to include VRML2 as a world data format. Note that active development on this system stopped a while ago, though the code is still available for the curious. The code may not even compile on current Linux or Irix systems.
DeltaMUD is a MUD server based on enhancements to the original CircleMUD bpl12 source code and is thus bound to the legal terms contained within the CircleMUD and DikuMUD license agreements. The goal of this project is to provide an enhanced, memory optimized, and SQL-based version of the original CircleMUD.
The WorldForge Project is developing a complete, distributable framework for massively multiplayer online roleplaying games. The system will include a number of fully developed roleplaying worlds with unique maps, histories, creatures and legends. To run these worlds on the servers a balanced but highly customisable set of roleplaying rules is being developed. Provisions will be made to allow others the ability to recode the servers to use alternate rule sets. A standard protocol named Atlas is being developed to allow a common communication layer between clients, servers, and associated tools. For software packages that make up the system being developed by the WorldForge project, please see the dependencies for this record.