Weight Paint ++

Free Addon AutoUV is a Blender addon that automatically generates a UV map in one click. Distributed under the GPL license, it works with the Cycles and Eevee render engines.

Power Paste is a Blender addon that pastes clipboard images directly into the editor under the mouse, creating the relevant materials, texture nodes, or geometry automatically. A second paste mode pre-processes height and displacement maps.

Shape Key Manager is a Blender add-on for managing shape keys in bulk. Move, rename, delete, or apply dozens of shape keys with a couple of clicks rather than handling them one by one.

Specio Free is a set of tools for Blender that improves 2D-to-3D workflows starting with SVGs. It imports vector files with fixes and prepares each curve for further 3D work.

Sync Blender is a Blender add-on from Jishnu Jithu that saves your settings, add-ons, extensions, bookmarks, presets, preferences and more, in one place, then restores or syncs them across different Blender versions with a click.

BlenderAe2 by Salt Media transfers 3D data and objects between Blender and After Effects in both directions, covering vertices, 3D layer transforms, camera data and layer synchronization.

Machin3Tools is a continuously evolving collection of tools and pie menus for Blender, gathered in a single customizable package. It ships in two base variants, Prime and DeusEx, with the DeusEx variant adding more advanced tools.

3D Print Toolbox is a Blender add-on with utilities for 3D printing. It analyzes mesh volume and surface area, checks and fixes geometry, hollows shapes, aligns models to the print bed, and exports to STL, PLY, and OBJ.

UVPackmaster 4 is a UV packing engine for Blender that packs UV maps on the CPU and GPU, using the Cuda and Vulkan APIs, and can run on the CPU and all system GPUs at once.

MMD Tools is a Blender add-on for editing MikuMikuDance (MMD) models. It handles importing and exporting model, motion and pose data, along with chopping and joining parts, plus rigid body, material and motion editing.

SimpleBake brings PBR and traditional texture baking to Blender from a single panel. Select objects, choose maps, and bake — no special node groups or new workflow, working with whatever materials you've already built.