Flowify

Flowify is a Blender add-on for 3D modelers that can bend an object to a surface object that has evenly spaced four sided faces and four corners or are cylindrical in nature. A simple flat reference grid is used to guide the deformation.

This enables the creation of interesting objects that could be challenging to model otherwise.

https://blendermarket.com/products/flowify

Building nodes

This is an add-on for Blender for procedural generation of buildings. The work of the add-on is similar to panel housing construction.

https://randum.gumroad.com/l/building-nodes

MACHIN3tools is a continuously evolving collection of blender tools and pie menus in a single customizable package.

https://blendermarket.com/products/machin3tools

ToOptimize Tools

ToOptmize Tools is an addon for Blender that will help you optimize your scene in a simple way with very useful tools. The addon will show you what is making your scene heavier, comparing each object, collection, texture, and material in your scene!

https://blendermarket.com/products/tooptimize-tools

Launch Control // Auto Car Rig

LC (Launch Control) strives to make vehicle animation accessible and eliminates the usual problems you stumble over, when turning your action-sequence dreams into reality (a virtual reality, that is).
The simple interface packs a ton of power and in the "Manual Gearbox" you have a world of customization options to tune LC to your liking.

URL: https://blendermarket.com/products/launch-control--auto-rig-for-vehicles

Ocd (One Click Damage)

Turn simple into stunning with 'One Click Damage'.
This ultimate tool adds realistic wear with just a click. Choose your model, adjust, and instantly enjoy a highly detailed, lifelike asset.

https://blendermarket.com/products/ocd

Retopo Planes

Retopo clothes without losing details or breaking a sweat!

https://blendermarket.com/products/retopo-planes