Lightweight, high-performance HTML renderer for game developers
FlightGear Flight Simulator: free open-source multiplatform flight sim
A simple 3D framework in C++
Open Source Solid Modeling CAD
Lightweight and modular C++11 graphics middleware for data and games
A 3d rendering framework
3D .NET engine for Windows, Linux, Mac
Get as many FPS as you need and amazing effects by rendering HTML/CSS
simple 3d scene viewer for windows/linux/android
A cross-platform game framework based on OpenGL and GObject.
Pear3DEngine is a modern and modular 3D development framework
Minimalist 3D Scenegraph Management Framework
A Lightweighted Toolkit For Volume Rendering
A continuation of the abandoned Tao Framework project.
PixelLight is a cross-platform application framework
In-flight navigation (and more) for private pilots (Linux).