The flexible game engine
SDL based generic 2D game engine
LDraw™ editor for LEGO® style digital building instructions.
INSTEAD - Simple Text Adventure Interpreter.
Updated emulator of Forgotten Realms: Unlimited Adventures
A cross-platform, open-source, pure C game engine for mobile game
OpenGL port of the classic 6dof 3D shooter Descent
Multi-threaded 2D Renderer licensed under the Mozilla Public License
Minecraft clone written in C using modern OpenGL
A Simple Game Engine
realistic truck simulator with 3D graphics done from zero
A complete 2D Game Engine with built in drag and drop editor
Megalui: 2D/3D OpenGL & C/C++ Library for Scientific Visualizations