DECALmachine tries to work seamlessly with as many other addons as possible.
Batch Ops™2 is a highly sophisticated data manager. It can outline/arrange/control all your modifiers, materials, collections (and other data) in the currently open file, scene or among the visible objects.
Hard Ops is a toolkit aimed at assisting users with everything from modelling to rendering, with a focus on hard surface design.
MACHIN3tools is a free, continuously evolving collection of blender tools and pie menus in a single customizable package.