An addon that lets you efficiently manage your shapekeys.
You can easily move, rename, delete, and apply* shapekeys by bulk.
Although it is a very complete addon as it is it still needs a bit of work so I'll probably upload v.1.1 soon with a few more features like blendshape duplication (that automatically puts it below the duplicated blendshape instead of having to then move it with another action).
*With apply I mean 'Create a new shape from mix' but with just that specific shapekey, disabling all the others, you can do this with a selection of shapekeys and automatically add a suffix/prefix to it.
This is my first addon for Blender so if I'm missing something I would appreciate it if you let me know, thanks.