OgreWin3D
TX Library is a tiny graphics library for Win32 written in C++.
Open Game Bootstrap
Multimedia asset management and manipulator for Étoilé
Multi-threaded 2D Renderer licensed under the Mozilla Public License
C++ Framework for slot machine games
Extremely simple joystick rumble / vibration library
Cross-platform reimplementation of AMOS BASIC (runtime)
easy programming language for 2d games
A C++ library for programmers transitioning from "Game Maker Language"
A DirectX based graphics/physics engine
Basic real-time simulation engine in C++
DREAM is an Open Source GCS
A simple WinAPI game engine