URG! The Ultimate Ragdoll Generator - Developer Edition - Unity3D

URG! Is a little smart artificial intelligence wrapped around ragdolling goodness, that takes care of the complex job of automatic determination of limbs and extremities positions and extensions in an arbitrary game model.
URG! takes care of finding the arms, legs, spine and head of your game models, and then creates all the physics objects for the joints (unity's character joints) and body parts (unity's rigidbodies and colliders), using a thorough set of parameters to allow fine-tuning of the ragdoll behavior.