A free turn-based multiplayer medieval fantasy strategy 3D game. What more could you ask for ? =D (Code under the GPL license, Art as Creative Commons)
The OpenBlox Game Engine is a free, open-source 3D game development kit written in Python.
Users create their worlds with Lego-like bricks, so no 3D modeling experience is required.
The engine is also cross-platform (across Windows, Linux, and Mac OSX, with iPhone and Android support being considered), and includes the following features:
* Scripting, via Lua * XML-based scene format * Cross-platform game distributing - write once, run anywhere * .zip game compression * A scene editor is also in the works
Go to http://openblox.sf.net for the main website, and http://openblox.hg.sourceforge.net/hgweb/openblox/openblox/ for the Mercurial repository.
The actual OpenBlox code is licensed under the GPL license (version 3), with wiki and documentation under the Creative Commons Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0) license.