FlightGear Flight Simulator: free open-source multiplatform flight sim
Kokua is a V3 based open source metaverse viewer project.
LDraw™ editor for LEGO® style digital building instructions.
3D Engine c++
3D fractal rendering software
Open Source Solid Modeling CAD
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
DirectX 8 to OpenGL wrapper for legacy apps and portability
Doing 3D with Tcl
High-efficiency minimalist C++ wrapper for OpenGL 4.3
A simple 3D framework in C++
CIRT - CUDA Interactive Ray Tracer