Shapekeys Extended
Features
Hierarchy layout with collapsing groups for organization
Moving and reorganizing groups of shapekeys
More convenient UI layout
All features (new and old) now work in edit mode
New "Copy Shapekey" button that will copy the data from the currently selected shapekey to a new one
"Apply as Basis" button that will apply the current selected shapekey as the basis and adjust the rest to match
"Copy and Split Shapekey" button that will split a shapekey in the middle into left and right, while keeping the original.
Any new shapekey will be added below the current selection instead of bottom of list
"Remove Shapekey Influence" buttons that will remove/reset the current changes of your shapekey back to default for either your selected vertices or all.
"Add Facetracking Shapekeys" section that will let you choose from a list of common face tracking standards such as Vive, ARKit, Meta, UnifiedExpressions, and MMD (jp & en)
All default shapekey options are still available but the same improvements
Installation & Usage
Installation:
To install the blender add-on, open Blender, and go to the top left of the window. Under Edit>Preferences>Add-ons, you can select install from the upper-right corner of the window and select the downloaded ShapekeysExtended-CasTools .zip folder. Once it is installed, you can find it in the add-on list and enable it.
Usage:
To use the add-on once it's installed, you must selected and active object then go to Properties>Data>ShapekeysExtended. It will be in the same location as the normal shapekey panel, you may just need it scroll down and drag it up higher in the list. From there, you can use it like the normal shapekey panel but with the added features listed above!