Godot Animation Tool is a Blender add-on from CELPEC aimed at getting animations ready for Godot. Its operations are built to run in batches, so you can stash and export the actions you want, add root motion across multiple animations, and apply armature rotation and scale in one pass. Every operation is non-destructive and leaves the original keyframes intact.
Root motion works with Rigify and other complex IK rigs, using baking to generate the motion, and you can switch the root-motion axis between full XYZ or the XY plane. A later update added Unreal root motion support. The bone rename kit handles single or batch renaming, supports regular expressions, and can import and export rename rules to and from files. The tool also calculates each animation's size so it stays within limits.
It runs on Blender 2.81 through 3.0 and is distributed under the GPL license. A demo video and a Discord community are available, along with documentation.