GLScene Engine for Delphi & C++Builder VCL Windows 32/64
rayshade and POV for Mathematica Export + view
Growth-grammar related Interactive Modelling Platform
Open Source graphic tool and alternative to Insane Bump
A WebGL graphic library for building scalable Web3D applications
A 3d rendering framework
Design and Display Happy Cube solutions
shader editor
sauerbraten with LuaJit2 scripting
3D world editor for game development
Game engine supporting many 3D/2D formats and graphic effects