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.
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.
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.