Lightweight, high-performance HTML renderer for game developers
A simple 3D framework in C++
3D fractal rendering software
A real-time 3D Engine written in Ada
Open Source Solid Modeling CAD
Doing 3D with Tcl
3D Engine c++
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
Interactive 3D Layout Viewer for GDSII
realistic driving simulation + functions for 2D/3D graphics
FlightGear Flight Simulator: free open-source multiplatform flight sim
Kokua is a V3 based open source metaverse viewer project.
crossplatform multithreaded object-oriented render and audio engine
Tools to process and visualize scientific data and images
Vivid3D is a C++ IDE/3D engine, with python scripting.