3D Engine c++
FlightGear Flight Simulator: free open-source multiplatform flight sim
An interactive viewer for three-dimensional chemical structures.
Xj3D is an open-source Java codebase for the X3D Graphics standard.
Open Source Solid Modeling CAD
Tools to process and visualize scientific data and images
C++ header-only library that simulates GLSL math
realistic driving simulation + functions for 2D/3D graphics
Doing 3D with Tcl
A real-time 3D Engine written in Ada
A simple 3D framework in C++