Free add-on: armature compatibility to/from any application

Jim Kroovy writes:

The easiest way to work with skeletons and animations between Blender and other applications!

Armature Deform Controls is an add-on for Blender that will maintain compatibility for existing assets while enabling artists to rig and animate in Blender in any way they choose.

It can quickly and easily setup bones that indirectly manipulate the source armatures original bones but with Blender friendly orientation for rigging and animation as well as bake animation between control/deform bones whenever required.