Blender – Auto-Rig Pro V3.68.67 + Quick Rig V1.26.18 Free Download
https://blendermarket.com/products/auto-rig-pro-quick-rig
Don’t waste your time re-rigging already rigged characters anymore!
Quick Rig turns rapidly any skeleton + mesh into a full Auto-Rig Pro armature with controllers ready for animation, including weights preservation, IK-FK generation, animation support.
Built to support the vast majority of character skeletons, even non-standard bones axes.