Java based 2d Game Engine
Role Playing Game Engine
Java Client + JS/Canvas Server-Side System, with maintained Objects
"Abysmal Depths" is a simple C++-based text adventure game engine.
Framework for a graphical point and click adventure game in Java
Pig2D is a game engine for Java that uses a sprite-based interface.
Free MMORPG Engine. Develop and host graphical browser-based games.
MKEngine is a game engine for Text-Based games.
A 2D Java game engine