The open-asset-importer-library repository
Open game and rendering engine packed into a JavaScript framework
aka ogre v2 - scene-oriented, flexible 3D C++ engine
Vivid is a modern C++ 3D engine using OpenGL4+
A Headless Chrome rendering solution
A declarative 3D globe data visualization library built with Three.js
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
3D .NET engine for Windows, Linux, Mac
VB6 Raytracer
Pear3DEngine is a modern and modular 3D development framework