I just released the first version of CopperLicht
Basically, it is pretty fast and can render huge maps like here a full quake 3 level in playable speeds. (If you notice, this one is the quake map from the Irrlicht SDK). You can try out the demo yourself here
CopperLicht is free to use. You can use CopperCube
as world editor, so you can edit your worlds in 3d and write your game with CopperLicht. The API of CopperLicht is pretty easy to understand, and if you ever tried out Irrlicht, you'll notice that those are very similar. The SceneGraph and Material API is nearly the same, and loading textures and extending the engine works very similar as in Irrlicht.
CopperCube has been released in a new version as well now, it now also supports publishing its 3D scenes as WebGL, using CopperLicht of course.
This is the first release of CopperLicht, and it's an alpha version, so if you have any suggestions, comments, feature requests and similar, please don't hesitate. :)