GPU Texture Generator
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
A public domain cross platform 3D game
3D .NET engine for Windows, Linux, Mac
A simple and easy to use render farm for Blender
3D tree generator
a java based software to convert 2D to 3D images.
A cross-platform game framework based on OpenGL and GObject.