Real-time physically based rendering engine for Android, iOS, and more
aka ogre v2 - scene-oriented, flexible 3D C++ engine
High-efficiency minimalist C++ wrapper for OpenGL 4.3
FlightGear Flight Simulator: free open-source multiplatform flight sim
Open Source Solid Modeling CAD
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
Support for legacy OpenGL in core profiles
3D Engine c++
DirectX 8 to OpenGL wrapper for legacy apps and portability
LDraw™ editor for LEGO® style digital building instructions.
crossplatform multithreaded object-oriented render and audio engine
Interactive 3D Layout Viewer for GDSII
3D Without Boundaries
Scanning Probe Microscopy Controller and Data Visualization Software