Superhivemarket - Animation Layers v2.1.9.7

https://superhivemarket.com/products/animation-layers

Software Version 4.3, 4.2, 4.1, 4.0, 3.6, 3.5, 3.4, 3.3, 3.2

• Animation Layers is an addon that simplifies the work with the NLA Editor into a standard animation layers workflow. You can quickly create, select and edit each layer, and always seeing the end result while working on any layer.
• Add or Remove Layers quickly, or control their Influence using NLA's "Mute, Influence, Solo and its Blending modes" options.
• When you are happy with your animation, you can always merge your layers or bake into a new layer.
• If you want to keep the same amount of the overall keyframes after baking, then you can also use the smart bake option.