Auto-Rigging

Rigify (pre-insalled addon) + Extensions & Addons

Auto-Rig Pro

Rig Creator

CloudRig

BlenRig

Mantis Rigging Nodes

AutoRig

Rig On The Fly

Pupa Animate Pro

Armature Rigging Modules

Auto-Rig Pro: Rig Library

Auto-Rig Pro: Easy-Animations

Mixamo (web app)

Mesh2Motion (web app)

AccuRig

Lazy Bones

B-RigNet (deprecated)

Auto-Rig Pro: Quick Rig

Mixamo Rig Addon for Blender

Expy-Kit

Retargify

Rigi-All

UE to Rigify

1 Click Rig

Mixamo To Rigify (In One Click)

Any Rig to Rigify

Rigodotify