An online multiplayer turn based strategy game and board game engine.
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Gorgon Game Engine (GGE) is a C++ game engine that handles many tasks.
A multiplatform game engine for interactive fiction experiences
A very small multi-platform game engine for creating desktop games.
UtiliGame is a light-weight game engine written in Java.
Javascript adventure game engine
A game engine in java for 2D strategy games
Game engine supporting many 3D/2D formats and graphic effects
Free MMORPG Engine. Develop and host graphical browser-based games.
MKEngine is a game engine for Text-Based games.
Zap Engine