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.
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.
Beat Back the Horde is a rhythm-time strategy game for Android 2.2 and up, focusing on fast-paced placing of units while tapping to the beat! Build up combos to spawn Über Units! It is playable in single-player mode, or in multi-player mode over Bluetooth, and can be learned in a minute and played for hours. It includes many achievements to unlock, five songs to master, adjustable difficulty single-player AI, and particle effects.
EPIC is a multiplayer strategy roleplaying game in which you are pitted against or work with real people in various fantasy settings called modules. It starts with Conan and Malazan modules. Third parties can create new modules. The system supports adventures, armies, characters, assassins, guilds/buildings, very rich magic (over 400 spells) and over 2,000 items, in a realistic fantasy world . The game focuses on minimum game time but the maximum amount of time thinking about the game and your cunning plans with your allies. There's no farming or repetition. The game format encourages the creation of epic fantasy tales. Part of a player's turn is in real time, but movement and military orders are done as submitted orders which are processed as your turn.