The open source mesh processing system
FlightGear Flight Simulator: free open-source multiplatform flight sim
3D Without Boundaries
Vivid is a modern C++ 3D engine using OpenGL4+
Geometry processing library for Python
Sorry this project is no longer being supported
A public domain cross platform 3D game
kicad 3D is aimed to add 3D realistic feature on kicad pcb CAD
Megalui: 2D/3D OpenGL & C/C++ Library for Scientific Visualizations