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 ...
Blender add-on for importing some files from drag-and-drop. This addon loading DLL written in C++ into Blender via Python, and replace view3d_ima_empty_drop_poll function in memory. If you enable this ...