Community-driven game engine
Multi-platform game engine similar to old Megaman with a stage editor
A 3D game engine in java.
Paintown is a 2d fighting game engine.
3D Game Engine
Mahasona engine is an open source game engine.
A basic 3D environment with a first-person POV
3D Game engine
Small OpenGL based game enegine
Visual Novel engine, editor and game development.
A truly extensible cross-platform game engine
Tactical, turn-based game engine, that uses OpenGL and WinAPI
A very small multi-platform game engine for creating desktop games.
Java Client + JS/Canvas Server-Side System, with maintained Objects
WGFX 2D Game Engine
"Abysmal Depths" is a simple C++-based text adventure game engine.
A game engine created for a Game Design module at university.