Multiplayer geography game.
Simple server list with direct connect via scripts.
Fly, bomb, shoot sh*t.
Multiplayer dungeon crawler
Turn based tactical battle multiplayer game with Aliens and Marines
Modular Minecraft server plugin - commands, events, ...
Bagh Bandi - 2 player board game
A multiplayer First-Person-Shooter game built in Java 3D
HeroCraft Abilities Using the CraftBukkeit Plugin
LetsPlay is a bukkit plugin.
A fun reflex game for the PC written in Java
A economic manager for the game Pirates of the Burning Sea