GP Tween (c)

It works pretty good! This functionality definitely should be part of Blender by default.

Hello, my friend! First of all, I wanted to say that this is a wonderful add-on; it greatly facilitates the animation workflow. I would like to ask if what you use to deform and the use of these bezies are also external add-ons?

Cool

This should be built-in Grease Pencil by default!

Amazing!!