I recently found out about another game engine known as Nineveh from this forum posting that has entered into open beta. It looks great so far, and is well documented so if you want to play around with it you can just dive right in.
A few of the features offered are:
- Support for .OBJ and Collada meshes
- Reflections, Speculars, Bump mapping
- Easily combine shader effects
You can find Neveh here:
Be sure to check out their set of video tutorials if you want to learn how to use Nineveh quickly here:
While it’s still in open beta it looks great. The have stated that this is a free game engine – and not just freely available because it is in open beta.