Link: fb_bonechain (http://www.borderequals0.org/3ddev/fb_bonechain.cfm)
This plugin adds a chain of bones or muscles.
Select the start of the chain either by selecting an item or using the select box.
Select the target by either "CTRL" selecting the target or using the select box.
Specify the number of bones, type and control style (muscles only) and execute.
Currently muscles are drawn in hidden mode. After the bones are created change their visibility manually.