A world editor for HGE game engine written in python and uses OpenGL.
A cross-platform game framework based on OpenGL and GObject.
3D game engine for C and C++
A small library to create SDL 2 - OpenGL applications.
An object oriented 3D graphics API on top of OpenGL
Imprudence is an open source metaverse viewer project.
Pear3DEngine is a modern and modular 3D development framework
Minimalist 3D Scenegraph Management Framework
https://github.com/horde3d/Horde3D
Multi-Language Wrapper Collection for the Irrlicht Engine
A C++ library to easily create GUI-editable objects