WIP Game engine
Scripting language of the hawk game engine
Browser game engine
cross-platform 2d game engine
RTS engine
Java game engine for shoot 'em ups, using Java2D.
Framework for a graphical point and click adventure game in Java
A game engine in java for 2D strategy games
Cross Engine is game engine for Windows, Mac, Linux and Android
Point-and-click 2D game engine
Java Game Engine 2D
SDL game engine made for Ludum Dare 24
Pig2D is a game engine for Java that uses a sprite-based interface.
Demonstrating the features of jMonkeyEngine 3.
Cross-platform 2D game engine
Java OpenGL game engine demo.
Game engine supporting many 3D/2D formats and graphic effects
OSGET is the first open source mobile game engine template.