Blender Market Bonedynamics Pro v1 3 6

BoneDynamics Pro is a blender addon that allows you to add physics to bones.
Features:
Tweak one or multiple bones physics parameters on the fly
collision on the entire bone
Bones react to movement and collision.
Super easy to setup.
Ability to stretch bones.
Ability to make a bone chain.
Easy to tweak (it uses soft body under the hood).

http://blendermarket.com/products/bonedynamics