All Inverse kinematics

Blender Development Fund
Asset Library
Blender Development Fund
Asset Library
Armature Hierarchy
$5

Blood Pixel in Addons

Rig a Character in Blender: Rigging Fundamentals (5.2 LTS)
$39.99

CG Cookie in Training

Basic Wire Rig
$2.50

Null Station in Addons

Hamster Rigged and Groomed 3D Model
$6.99

ArtLab in Models

Quick IK
$2 Dev Fund Contributor

Blender.Fun in Addons

The Ultimate Guide to Blender 3D Rigging and Animation
$24.99 Dev Fund Contributor

3D Tudor in Training