<Rigging
Free & Paid
Free
Paid
rapidSDK
rapidSDK
braverabbit.gumroad.com
free
Smart Bones (auto action constraints)
Smart Bones (auto action constraints)
github.com
free
Automatic Driver Generator
Automatic Driver Generator
superhivemarket.com
paid
DriverRig: Shape Keys to Bones
DriverRig: Shape Keys to Bones
superhivemarket.com
paid
Cntrl
Cntrl
superhivemarket.com
paid
Easy Driver
Easy Driver
extensions.blender.org
free
Auto Wrinkle Map
Auto Wrinkle Map
extensions.blender.org
free
Driver Helper
Driver Helper
extensions.blender.org
free
“Drivers” (addon)
“Drivers” (addon)
superhivemarket.com
paid
Action Constraint Builder - Set Driven Key
Action Constraint Builder - Set Driven Key
superhivemarket.com
paid
Action Poser (Action Constraints) 
Action Poser (Action Constraints)
www.arminhalac.com
free