The method used to retargeting animation in addon is shared by Maciej Szcześnik in Unity Connect article "Retargeting animations with Blender 2.80". I made this plugin just to speed up the retargeting ...
FBX Action Exporter is a Blender add-on that streamlines the process of exporting all animation actions (NLA tracks) as individual .fbx files. It's especially useful for game developers and animators ...