Trek7 the original multiplayer network star trek game from the early-mid 70s. We are hoping to revive this classic (no, its not netrek/mtrek, not even close). hopefully the SF community can help port this to modern day networks.
Thousand Parsec is a framework for turn based 4 X's game (eXplore, eXpand, eXploit, eXterminate). Designed for long games, supporting massive universes and has an easily expanded tech tree.
Kingdom Wars is a client/server chess daemon designed to run on multiple operating platforms. Both the client and the server are stand alone. The network protocal is open, and custom clients are welcome to be developed.
Parlance is a completely open platform for playing the Diplomacy board game over a network, using the protocol developed by the DAIDE community. This Python-based system currently includes a configurable server, a few simple bots, and an observer.
Eternal Warfare is turn driven, browser based game. It will have multiple realms to play through and eventually travel back to. Development will be focused mainly on community driven systems and will also create a flexible character development system.