armature - How to find a length of a single bone (Drivers)? - Blender Stack Exchange
Join bones in a armature? - Blender Stack Exchange
I made a sample .BLEND file showing the Rigify to Unity Mechanim process. - Unity Forum
Parenting mesh to bones in Blender throws off the mesh's orientation after exporting to .babylon - Content creation (3dsMax, Maya, Blender, glTF) - Babylon.js
How to join more bones in a armature using the rigify addon pitchipoy - Animation and Rigging - Blender Artists Community