Bengine – My 2.5D voxel engine for flash, project from scratch about half a year ago. You can find some demos here:
http://bruce-lab.blogspot.com/p/bengine.html

And a game powered by the engine - Bengine Race[Released]:


(click to play!)

More about the game:
http://bruce-lab.blogspot.com/2010/0...owered-by.html

I think voxel is the future, it is simple and more useful and suitable for flash. Unfortunately, most developers just focus on triangle based 3D engines. My game (and the engine) is just a proof of concept. With the time, intelligence and skills for those famouse engines like Papervision and Away3d, they could create a much better voxel 3D engine for flash.
What do you think?