I'd like to present "Bonera", a Blender rigging addon created by Blenderboi who also recently created Game Rig Tools for us.
Bonera is a "swiss army knife" of useful rigging tools and automations. I made a 40-minute long overview video of the addon which you'll find below.
Information about the Bonera
Bonera Promo video by Blenderboi
Bonera overview video by CGDive
Or you can check out the product pages for a written description:
Gumroad page: https://gumroad.com/a/99062899
Blender Market page: https://blendermarket.com/products/bonera?ref=356
For the next couple of days, Bonera will be available at a discount. So if it seems like something that will be useful in your workflow, you may want to hurry up and get it now.
To get 20% off the full price enter coupon code "earlybird" on Gumraod.
On the Blender Market, the price is already discounted ($30 → $24), so you don't have to do anything special.