the Cafu Engine (formerly Ca3D-Engine) is now available to everyone as free software under the GNU General Public License!
The source code as well as precompiled binaries are available at our Downloads page, and the new Developers page explains how to get started with the source code quickly. In addition to the compressed archives, the source code is also available directly from the Subversion repository.
Cafu is a modern game and graphics engine for multiplayer, cross-platform, real-time 3D action.
It employs Bullet for its physics implementation of objects other than the player, both on the clients and the server, where the server physics state is synchronized over the network.
The player physics is implemented with own code that is part of the free source code.
Learn more at http://www.cafu.de/news!