Text Browser-Based MMO is a project with with forum integration.
JAVA websocket implementation for a bomberman-like game
MinecraftForge Server Software implementing the Spigot/Bukkit API
a Human and Artificial Intelligence Network
A simple 2D-Chess
canarymod plugin to play capture the flag on minecraft
Free strategy browsergame engine.
The original Xivio.com World Server Core
A Simple and Easy to Use User Interface for Private Bukkit Servers
Open Source Virtual World and MMOG Development Platform
Modular Minecraft server plugin - commands, events, ...
A multiplayer First-Person-Shooter game built in Java 3D
A Plugin for the Bukkit Server Wrapper system that messes with people!
Multi-user whiteboard emphasizing simplicity.