Wiggle Bones - Blender

Download
https://blenderartists.org/uploads/default/original/4X/1/5/e/15e1bc71b05a3546d9f38f69d55a4fd6c4c7b5fc.py

Example
https://blenderartists.org/uploads/default/original/4X/0/f/8/0f83ae3db31eac01accfcb8c53a123ff78029ed5.mov

Forum Post
https://blenderartists.org/t/wiggle-bones-a-jiggle-bone-implementation-for-2-8/1154726/23