Sakura's Advanced Character Rig is a lightweight and highly customizable rig for Blender 3D, and has been developed since early 2019. The current build, R7.4 was originally started as Revision 3 back in 2021, and has grown through various forms through the years, and now is fully integrated with a UI Extension for greater customizability

This rig is available in two places, here and through it's associated addon