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
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