BleRiFa

BoneChainRenamer is a Blender add-on that renames bone chains in a single step. You choose a root name, and it renames all bones in the chain accordingly. Documentation is available from the developer.

Extragroups is a Blender add-on from BleRiFa for managing bone groups and bringing all your operators under the mouse cursor. It targets animation work and ships with documentation on the developer's site.