FlightGear Flight Simulator: free open-source multiplatform flight sim
An interactive viewer for three-dimensional chemical structures.
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
High-efficiency minimalist C++ wrapper for OpenGL 4.3
CIRT - CUDA Interactive Ray Tracer
Support for legacy OpenGL in core profiles
crossplatform multithreaded object-oriented render and audio engine
C++ Frontend for the RenderMan Interface
Growth-grammar related Interactive Modelling Platform
Open source set for Notepad++ for building worlds in X3D and VRML
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
Tao3D is a programming language for real-time interactive 3D
A tool that uses OpenCL to procedurally generate 3D models
3D Charts - Templates for PovRay(TM)
Program for drawing 3D surfaces from parametric equations
.NET wrapper for the Irrlicht Engine
Perl bindings to the Modern OpenGL API
3D .NET engine for Windows, Linux, Mac
realtime 3d surface rendering library
Imagin Raytracer is a multithreaded command line raytracer
simple 3d scene viewer for windows/linux/android