IClone also has a particularly well-crafted physics toolbox, that uses 2 separate physics engines, Bullet and NVidia Physx, provided that you have an NVidia graphics card. The features of the IClone physics toolbox are extensive and it would take too long to describe them all here, so I let you see for yourself. See this link and this link.

Also note that IClone's physics toolbox is a paid plugin.