From OpenGL Wiki
These are full toolkits for developing OpenGL applications. They include everything you need.
- Graphics And Physics Framework
- German OpenGL based graphics And physics framework.
- Unofficial OpenGL SDK
- A collection of several cross-platform libraries, using a common build system to simplify OpenGL development. It distributes several easy-to-use libraries for GL initialization. It contains libraries for window creation, loading functions, loading images, vector math and more.