OSDL: Object-oriented Simple DirectMedia Layer. OSDL is a high level open source (LGPL/GPL) portable multimedia library, built upon Sam Lantinga's SDL (http://www.libsdl.org). Its goal is to provide a high level C++ framework to ease game development.
ErlyMUD is a small MUD server written using the Erlang/OTP libraries. The aim is to have solid support for exploration and roleplaying, within a concurrent, highly fault-tolerant environment.
Turn-based MMORPG written in Erlang (server side) and Java (client side) using the XMPP protocol for communication. Sanctuaire's goal is to maximise the game experience with tactical/strategical/economical/political and social actions and interactions.