Arminando

GameRig. GameRig is an auto rigging for games addon for Blender. Built on top of Rigify, it adds rigs, metarigs and additional functionality that enable game engine friendly rig creation. Open source and can be used for personal and commercial projects.

ActionPoser. Blender rigging addon that streamlines action based setups

armins_toolbox. Collection of Blender tools and plugins, mainly for rigging and animation.