scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Simple and low-consumption Java 2D Game Engine
Educational framework for OpenGLES, OpenCL and OpenAL
Free Android 2D OpenGL Game Engine
A multiplatform game engine for interactive fiction experiences
Framework for a graphical point and click adventure game in Java
Pig2D is a game engine for Java that uses a sprite-based interface.