3D Game Engine

What is the best or a good 3D Game Engine for developer games.
Like: 3D Power Render 4.0, OpenGVS, Morfit 3D State or 3D Game Studio.

“best” almost always requires a definition of intent. I could easily say the Quake3 engine is the best, but that requires licensing.

I am NOT a game programmer, I do simulations, but my recommendation is http://crystal.sourceforge.net/ Crystal Space, it has become relatively stable, good quality graphics, outdoor or indoor, etc. There are others if you browse around the net. But “best” will always be opinion based. And “free” is not always best… And no, I do not use Crystal Space, though we are debating on www.openscenegraph.org though the debate rages on…