JXFire is a Multi-User Dungeon game written in Java. It is using the Sun Gaming Server (aka "Project Darkstar") framework. JXFire aims at testing various game mechanisms rarely used, like uncertainty in gaming data perception, self-organizing ecological systems, or non-instantaneous information propagation.
Deliantra is an advancement of the crossfire multi-user RPG game. Unlike the original project, it focuses mainly on stability and playability, but also adds modern technology such as map scripting, Perl server extensions, asynchronous I/O, higher resolution graphics, and better client support.
PodSixNet is a lightweight network layer designed to make it easy to write multiplayer games in Python. It uses Python's built in asyncore library and rencode.py (included) to asynchronously serialize network events and arbitrary data structures, and delivers them to your high level classes through simple callback methods. Each class within your game client that wants to receive network events subclasses the ConnectionListener class and then implements Network_* methods to catch specific user-defined events from the server. You don't have to wait for buffers to fill, check sockets for waiting data, etc. Just do connection.Pump() once per game loop and the library will handle everything else for you, passing off events to all classes that are listening. Sending data back to the server is just as easy by using connection.Send(mydata). Likewise on the server side, events are propagated to Network_* method callbacks and data is sent back to clients with the client.Send(mydata) method.
Galcon Fusion is a high-paced, multi-player, galactic, arcade-strategy game in which you send swarms of ships to defeat enemy planets and conquer the universe. It features beautiful HD graphics, a full-length interactive soundtrack, achievements and detailed rankings, a variety of games including Stealth and Assassin, a retro mode, and colorblind support for up to 4 players. It supports multi-player, team games, and solo missions.
Ditchers is a multiplayer action game where underground tanks use a variety of weapons to find and destroy each other. Tanks dig tunnels in the soil with a limited supply of energy that can be refilled only in homes (as well as health). the GUI is controlled mainly by mouse, while gameplay is controlled only by keyboard. It is not difficult to create your own maps or to draw your own tank. The game supports split-screen, network games, and artificial players whose intelligence is programmable in the Lua scripting language. The game is inspired by Tunneler.
yuxtapa is a multiplayer real-time CLI game. It looks like a roguelike, but feels like a multiplayer 1st-person shooter with a focus on team play. The idea is to take the "feel" of such team based multiplayer games as Enemy Territory into an NCurses-based game with roguelike controls. Like roguelikes, yuxtapa is lightweight but surprisingly rich under the crude surface. It features several classes from which to choose, each with a different special ability, randomly generated maps which can also be saved and reloaded, and multiple game modes or objectives.
dosbox-ipxrelay is a very simple, super-low-overhead dedicated server to support the DOSBOX version of IPX-over-UDP for old games. In particular, when left completely idle, it should consume no CPU time whatsoever. It should also have substantially better latency than the DOSBOX built-in server. It was designed and tested on Linux, and it should compile on any modern POSIX-compliant system.