https://blendermarket.com/products/curvearraypro--magiccurve

Curve Array is designed as a flexible tool for creating arrays along a curve. Curve Array does not merge array objects, because it is not a modifier, and it does not distort the object mesh.

https://blendermarket.com/products/transfer-images

Transfer Images is a free Blender Add-on that allows you to transfer images from one UV map to another UV map in just a few Clicks.

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

True-Assets is the “one-click” Asset Browser blender should have been shipped with in the first place! True-Assets will automatically turn any blend file, any directory full of textures, and any directory full of HDRI images into marked assets stored for future use in all your projects.

https://blendermarket.com/products/import-as-decal

Import As Decal is a Free Addon for Blender that allows you to directly import images as Decals/Stickers and comes with an advanced Shader.

https://blendermarket.com/products/simply-concept

With Simply Concept, you can quickly and easily concept your idea. There are primitive objects to choose from as well as your own created model you can directly integrate into the conception and adjust the resolution of the level of detail (performance).

The cool thing about Simply Concept is that complex shapes merge in real time and you can already see the shading of the crossing parts. This makes designing easier. You can change any primitive at any time as long as you haven't confirmed your concept. So you can make changes at any time.

https://blendermarket.com/products/rbdlab

BDLab is a new addon to take full advantage of Blender physics. From fracturing objects to making them explode, adding smoke, debris or advanced use of constraints, RBDLab will allow you to do things in Blender that until now were practically impossible or in which you had to spend a huge amount of hours. 

RBDLab has different option panels and a "linear" workflow, from Fracturing, Rigidbody, Constraints, Simulation, Particles... you will go through all the phases that a good RBD system requires.

https://blendermarket.com/products/terrain-creator

An addon for creating terrains quickly and simply, using a combination of procedural noise with drawing features that allow you to draw terrain features like mountains and valleys directly on your terrain for precise control over placement. Choose from a variety of presets to get started, draw your terrain features, customize material colors and settings, add and customize water level with generated shoreline, erosion simulation, foliage scatter, all combine to create an endless variety of terrains.

https://blendermarket.com/products/malfunktion

A pack of over 50 effects, filters, and distortion presets for real-time rendering.  Easy to use. Fully procedural. Fully editable. Supported by both Cycles and Eevee.

https://blendermarket.com/products/smart-object-select

Smart Object Select is a blender addon, which is used to make smart selections of mesh objects.

https://blendermarket.com/products/open-solid

Open Solid - Blender add-on that allows opening all .blend files with the "Solid" viewport mode, even if they were saved with the "Material Preview" viewport mode.

https://blendermarket.com/products/animation-layers

Edit your animation or mocap data quickly using a standard animation layers UI and workflow directly in your 3D viewport with an extra layers functionality.

https://blendermarket.com/products/faceit

Faceit is an all-in-one facial rigging, motion capture and animation Add-on. An intuitive, semi-automatic and non-destructive workflow guides you through the creation of facial shape keys that are perfectly adapted to your 3D model's topology and morphology, whether it’s a photorealistic human, anthropomorphic or cartoon model. You maintain full artistic control while saving a ton of time and energy.

https://www.blendermarket.com/products/drag-n-drop-import/
 

Optimize your workflow with Drag and Drop Import for Blender. Quickly and easily import files by dragging them from your file explorer and dropping them into Blender’s 3D Viewport or Outliner. No more navigating through menus or dialogs - just a seamless and efficient process!

https://blendermarket.com/products/all-material-list

Display Material / Image / Light / Camera / World / Scene / Action in a list and improves data management efficiency.

https://blendermarket.com/products/easy-smoothies

A quick way to Shade | Flat Smooth or use Subdivision modifiers with custom values on multiple objects

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/uvpackmaster

 

UVPackmaster is the most efficient UV packer out there in terms of packing on CPU, but it also provides a Cuda-accelerated variant of the algorithm. When running on a GPU, it significantly outperforms all other packers available.  But what can be faster than running an algorithm on a GPU? Running it on the CPU and all GPUs in the system simultaneously! UVPackmaster will do exactly that to reduce the time needed to perform even the most advanced packing scenarios to seconds.

https://www.dillongoostudios.com/gooengine

Goo Engine is our custom build of Blender that was made specifically to our team's needs. Our team specializes in making 3D anime in blender, and we have made our custom build available for others to do the same.

K-Cycles is a highly optimized custom build of Cycles-X render engine, ultra lighting, post FX, ultra denoiser and realtime viewport lighting and effects for Blender. It is fully compatible with Cycles and designed for Nvidia GPUs.

https://blendermarket.com/products/pupa--pro

If you are looking for a tool to help you create a simple and fast workflow for rigging, applying, and customizing animations, or retargeting animations, this is for you. PuPa Animate Pro has been designed to be Userfriendly, fast, and Scalable for all your production needs.