The Cafu Engine is an all-purpose, modern 3D graphics engine and game development kit, feature complete to get you started quickly. Cafu is available to everyone as 100% free software under the GNU General Public License (GPLv3). It can be used to create a variety of 3D applications, including games, simulations, and training and architectural software. Written in C++, the tools, libraries and framework have been designed to make the development of new games and other 3D applications easy. They are actively and continuously developed in order to provide the latest technology.
The lastest binary until today (15th of April of 2012) for Windows 32 bits version. Just extract and use it...
If a recent 64-bit Windows release is not available, you can use the newer 32-bit edition as well. The development releases are less tested than the stable releases below, but they include all the latest features and bug fixes.