Modular Minecraft server plugin - commands, events, ...
A tool for roleplaying gamemasters
An 8 bit emulator created on the scratch, including an assembler.
Unless you're getting started in Java, you probably don't want this.
A variation of the classic Mario game with a custom map editor.
Java Game, Simple 2d, for Practice and Examples
AMOS BASIC reimplementation in Java
League of Legends Recommended Item Editor
3d peer to peer chatroom where associated pairs of text gravitate
A cross-platform Java 2D graphics library using OpenGL.
Multi-user whiteboard emphasizing simplicity.