Xj3D is an open-source Java codebase for the X3D Graphics standard.
C++ header-only library that simulates GLSL math
Java3d scenegraph editor
3D Without Boundaries
Tao3D is a programming language for real-time interactive 3D
A real time 3D graphics engine written in C++
PyMOL is an OpenGL based molecular visualization system
3D rendering and scene graph library (moved to GitHub)
Panda3d to Tcl bindings
free implementation of the OpenGL Character Renderer
Compose render props components like a pro