aka ogre v2 - scene-oriented, flexible 3D C++ engine
A real-time physically based 3D rendering engine for React Native
Vivid is a modern C++ 3D engine using OpenGL4+
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
A WebGL-based 3D engine for technical visualization
3D rendering and scene graph library (moved to GitHub)
Implemention of SGI's Open Inventor.
PHIGS (Programmer's Hierarchical Interactive Graphics System)