https://blendermarket.com/products/geosim--photorealistic-planets-eevee--cycles

GeoSim is an add-on which allows the creation of photorealistic, realtime, customizable planets in a matter of seconds. Combined with a robust and easy to use shader nodegroup, GeoSim is a must-have for any 3D artist looking to create space/sci-fi scenes.

Planet generator 1.0 [Blender]

https://blendermarket.com/products/planet-generator-1

AutoRebar is an App that provides Autodesk® AutoCAD® (and all vertical products) with an extra toolbar with specific objects for rebar detailing of reinforced concrete structures.

https://blendermarket.com/products/grid-modeler

 

Grid Modeler is a convenient tool to create 3D model easily.  Grid Modeler let you Boolean Cut by drawn shape or Create mesh on top of each other. It is a new modeling workflow in blender. It is proven and very efficient.

https://www.mecabricks.com/en/shop/product/6

The MecaFace add-on allows you to easily add a Lego styled two dimensional face rig to any selected object in your Blender scene for your renders and animations.

https://blendermarket.com/products/rust-blender-addon

The RUST Blender Addon creates a quick rust shader for your 3d models, its works with Eevee and Cycles.

https://blendermarket.com/products/dynamic-grooming

If you want to make a faster workflow to groom your particle hair inside Blender.  This addon enables you to Style hair particles using dynamics, using default blender comb tools from a pie menu and since version 0.6 Beta7, style the hair using shapekeys  With the shapekey you can create animation, making the process to animate faster, because you won't have to keep tweaking the dynamics to reach a specific result, now you can sculpt the results for a specific frame.  Besides the shapekey option, you have most of hair particle options inside a panel, organized for better control and faster setup

https://blendermarket.com/products/curves-to-mesh

Curves to Mesh is an add-on for experienced 3D modellers who need to create mesh surfaces from bezier curves.

https://blendermarket.com/products/realtime-materials-for-blender

    The Realtime Materials Addon is a Library of over 290 procedural materials. This material pack allows you to apply complex materials with one click. You no longer need to spend hours playing with nodes to get your hands on high quality 3D materials.

https://blendermarket.com/products/simple-bend

Simple Bend is a handy tool for bending sub-divided mesh.

1. You add the edge-loops or sub-divide your mesh

2. Select the faces for bending (it can be all faces of just the middle parts)

3. Run the tool, Drag on the yellow axis to bend.

https://barell4.gumroad.com/l/NeonGen

fully procedural Neon Signs Generator based on GeoNodes Strings!
complete control over the font, size ecc.
procedural shader for glass and neon light
control over the grid, supports and wires

https://blendermarket.com/products/quake-handheld-camera

No more using motion tracking to create realistic camera motion or handheld effects for your angle shots, no more fcurve crap, this addon creates all that for you with just one tap, its all procedural

https://www.blendermarket.com/products/DECALmachine

DECALmachine is a blender addon, which through mesh Decals, allows for surface detailing in a very non-committal, non-destructive, UV-less way. As such it represents an alternative approach to hard surface texturing.

https://www.artstation.com/marketplace/p/P3RY7/city-road-builder-pro

City Road builder is blender's most advanced road system that makes adding roads to your scene curved or straight so easy, it comes with a lot of features and more to be updated in the future with more advanced lighting system, more roads, junction maker and so man others

https://blendermarket.com/products/hdri-maker

https://blendermarket.com/products/kit-ops-pro-asset--kitbashing-addon

This new CEDAR CREEK version has some nifty new features including the ability to create eroded Decal INSERTS as well as array your INSERTS.

https://blendermarket.com/products/lineworks

Lineworks v1.0 gives you that ability to quickly add rigged line strips and grease pencil lines to you characters. The lines will follow the surface of your character based on where they are placed and come complete with a rig that gives you control over the lines look.

https://blendermarket.com/products/smart-loops-toolkit

 

A set of tools for blender 3.0+ that will accelerate and enhance your modelling process. In a matter of seconds, upscale the resolution of your geometry (even boolean cutouts!) without distorting the faces around, undo/redo your bevels and much more! I am looking forward to hearing your feedback and feature suggestions. Have fun and I hope you enjoy using the tools!

https://blendermarket.com/products/memsaver-scene-memory-optimizer

memsaver is able to reduce texture sizes on objects or entire objects that end up being small in the final render. This reduces VRAM consumption and makes it a very helpful tool for big projects or if your hardware is limiting.

https://blendermarket.com/products/laces-generator

What if making laces could actually be satisfying!     

fully procedural     consistent trim UVs     rich customization     fast and easy to use

https://blendermarket.com/products/anytree

Anytree comes with over 40 premium-quality, fast-to-render leaves, ready to use in your projects. Animate the leaves using wind to get lifelike movement in ...

https://blendermarket.com/products/creative-flow

https://blendermarket.com/products/random-flow

Random Flow is a random mesh generator designed for fast and easy hard surface prototyping and concept art. This a fast changing add-on with lots of new functionalities in the future.