The “CGDive Auto Rig” is a new experimental auto-rigging addon for Blender by CGDive.
CGDive is also the maintainer of this website.
This addon is still in early development (Alpha) but it is capable of quickly generating a humanoid rig and even customizable, modular rigs with e.g. any number of heads, arms, legs, fingers, etc. as well as additional bone chains.
More rig presets such as animal legs, tails, etc. are planned for future releases.