3Dan

Autosmear is a Blender add-on from 3Dan that creates smears and duplicates for animation in a couple of clicks. Built on a geometry nodes group, it adds smear buttons to the 3D viewport's N-panel.

AutoTrail is an asset library of geometry nodes trees for Blender that adds highly customizable trails to animated objects. It works on both straight lines and curved edges and ships with more than 20 effects.