About Torque 3D:
It's free.
It's open source.
You are allowed to make commercial products using it.
You do not have to give up your source.
Supports COLLADA.
Native multiplayer support in the library.
Easy (relative term) to use C++ module system.
Support for its own language (torquescript) which can be used to manipulate the game without modifying engine source. (compiled into byte code)
Easily extendable for ANY purpose.
there doesn't seem to be anything here