Imperfect! - an addon for Blender that allows you to create instantly realistic projects where you need to add maps of roughness, scratches, etc. 

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

https://blendermarket.com/products/true-sky

True-Sky just got a complete night system with automated day/night transitions, procedural and HDRi night skies so you're never stuck deciding on the right lighting for your creative mind!

https://blendermarket.com/products/trimflow

Trimflow is a Blender add-on designed to add repeating patterns like ornaments or stitches to objects in a non-destructive way. It is very similar in approach to Substance Painter's Path tool, but utilizes trims instead of brushes.

https://blendermarket.com/products/bakemaster

 

We all know that models with loads of geometry require way more computer power to render. On the other hand, lowpoly model is easier to handle, and you can transfer high-resolution details onto it. This is called texture baking, and BakeMaster delivers everything you need to get it fast and of the highest quality.

https://blendermarket.com/products/sanctus-library-addon---procedural-shaders-collection-for-blender

 

The Decal Tool (Blender v3.5+). Sanctus Library has a non-destructive real time Decal Placing Tool with currently 352 images.

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.

https://blendermarket.com/products/materialiq

Materialiq v5.0.1 Material Library is a material library for the free and open source Blender software. It was designed from the ground up to handle time-consuming tasks that often involve creating and modifying materials rather than focusing on other important aspects of a scene. Blender resource browser integration, random material setting for each element/object, 20 new materials added (6 roof types, 12 wood types, 2 wall types), 14 materialiq4 materials ported to materialiq5, higher resolution material previews, ported world settings via materialiq4, shortened material names in polygoniq browser, added 4 water materials (animation only in aquatiq)

https://blendermarket.com/products/auto-rig-pro

Auto-Rig Pro is an addon for Blender to rig characters, retarget animations, and provide Fbx/Gltf export, with presets for Unity, Unreal Engine, Godot. First developed as my own in-house rigging tool, i've released it a few years ago and it expanded quickly thanks to great support from the community!

https://blendermarket.com/products/quick-physics

Introducing Quick Physics, a user-friendly Blender addon designed to simplify your simulation tasks. With Quick Physics, you can effortlessly add realistic physics simulations to your Blender projects with just a few clicks.

https://blendermarket.com/products/humgen3d

 

Human Generator is a Blender add-on and comes with full customer support for use in Blender, but currently not for other 3D software.

https://blendermarket.com/products/conform-object

For any 3D modeler that needs to project objects onto another object surface in one direction.

The add-on handles the complexity of doing this for you in a non-destructive way, using the source object's location and orientation to project it onto the target object's surface.

https://blendermarket.com/products/post-fx

Post FX is the ultimate post production addon, upgrading Blender's compositor with 42+ new tools and controls. Gain access to features such as: Color Calibration, Vibrance, Levels, Lens Flares and much more!  Includes an easy to use Layer System + powerful Pie Menu for experts. Create any custom pipeline in seconds without touching a single node connection!

https://blendermarket.com/products/krk2

Keyboard Render Kit 2 is designed to streamline the process of visualizing your mechanical keyboard and keycap designs. It starts with a focused UI layout arranged to present useful tools and content to help you on your way.

https://blendermarket.com/products/simplebake---simple-pbr-and-other-baking-in-blender-2

SimpleBake is the definitive baking solution for Blender. In short, it allows you to simply bake PBR and other textures.  Blender provides a very powerful way to create complex PBR materials by using nodes. However, what should be a simple process of baking and exporting these materials for use with other software or systems (Substance Painter, Second Life, Sketchfab, Unity etc.) is surprisingly difficult.

https://blendermarket.com/products/disassembler

I have created an addon that allows you to flatten and sort the components of, for example, a cabinet or anything else. The purpose of this addon is to make it easier to turn something designed in Blender into a physical object. Up until now, I would draw something (like a cabinet) in Blender and then manually flatten everything to fit it onto a sheet of wood. This process is time-consuming and prone to errors. The addon cannot 'nest' but can assist in the process.  Often, to estimate the cost of a product, it's helpful to know how much wood is required and the total surface area of everything combined. This addon can calculate that for you. Additionally, it can generate DXF files for the components that can be exported to a CAD program.

https://blendermarket.com/products/section-box

Section Box is the most complete Blender addon for architectural visualization, product design, and more. Effortlessly create stunning views, precise cross sections, and even complex elevations. With everything at your fingertips, integrated seamlessly into your workflow.

https://blendermarket.com/products/pcv

Convert points to various Blender data (mesh, instancer, particle system, Geometry Nodes instances, Geometry Nodes points) for rendering with any render engine.

https://blendermarket.com/products/profiler-blender-add-on

Profiler addon greatly improves the workflow for any artist, especially for architectural visualizations.

This simple add-on allows you to create beautifully shaped profiles just in a few clicks and you will have a bunch of options to tweak it as you like.

By installing this add-on you will get 70+ unique profiles with the following tweaking options for each one

https://blendermarket.com/products/auto-building

Auto-Building is a powerful add-on that utilizes Blender's Geometry Node to effortlessly create a wide range of building structures according to your preferences!

https://blendermarket.com/products/gobos

Library of textures to generate ultra-realistic shadows in your scenes. Thanks to the asset manager it's easy to import your gobos into Blender in 1 click. Discover a complete collection of HD ready textures for Blender.  14 categories are included. In total you will find 149 textures!

fixed gobos as well as animated gobos are available in different categories, also discover the new animated colored gobos in this new V2 version. Your animations will be incredibly realistic with these video textures.

https://blendermarket.com/products/mask-tools-sculpt-mask-utility

Enhances Mask operations in sculpt mode 

Saving / loading masks to vertex groups, masking edges / cavities, duplicate / separate / delete / displace modifier etc.