
Add Positive Cube
by jefftml
Add Positive Cube is a Blender add-on that adds a cube with its origin positioned at the corner. Handy for scaling while keeping the origin on the ground or against a vertical surface.
by lolpoly·Modeling
Images © lolpoly. Used for product review; image policy.
Multisculpt earns its place in the superhive library for handling multiple objects in a single sculpting or painting session without losing modifiers, materials or attributes. It holds a 5-star rating across 11 reviews and has passed 800 sales, and the developer invites bug reports and feature requests.
Multisculpt is a Blender add-on that lets you sculpt, vertex paint, texture paint and weight paint across several objects at the same time. It carries your objects' data through the process, preserving modifiers including Multires, transformations, materials, UVs, vertex colors, shape keys and any other custom attributes.
Version 2.0 was largely rewritten and works quickly, even on very heavy meshes. Version 2.1 adds shape key handling for Blender 5 and above, letting you transfer deformations to a new shape key or the basis and account for deformations from existing shape keys. Automatic isolate and hide commands swap visibility between your Multisculpt objects and the originals for before/after comparisons.
For vertex colors, Multisculpt reads from the active color layer of each original object and transfers changes back to whichever layer is active, handling different domain and data type formats automatically. On objects with a Multires modifier, you can work from the current Multires subdivision level instead of the base geometry.
Multisculpt is best for blender artists who need to sculpt, paint or weight several objects together while keeping each one's modifiers, materials and other data intact.
Multisculpt is completely free to download and use.
Multisculpt lists compatibility with Blender 4.2 through 5.1. It is a Blender-compatible extension distributed as an add-on, so it installs through Blender's add-on system across that range. Some capabilities are tied to newer releases: the expanded shape key handling introduced in version 2.1 is noted for Blender 5 and above. Within the stated 4.2 to 5.1 range, the core ability to sculpt, paint and weight multiple objects at once is available. Check the developer's page for the latest version details before installing.
Multisculpt preserves modifiers on your objects, including Multires, along with transformations, materials, UVs, vertex colors, shape keys and other custom attributes. For objects that carry a Multires modifier, it adds an option to work from the current Multires subdivision level instead of the base geometry. Beyond sculpting, vertex painting, texture painting and weight painting work the same way across multiple objects at once. The add-on was largely rewritten in version 2.0 and is built to work quickly, even on very heavy meshes.
Multisculpt is listed as free in this catalog. Licensing and any pricing can change, so check the developer's page for current terms before you rely on a specific arrangement. The add-on is distributed under the GPL license. If you need it for a team or commercial context, the developer's page is the place to confirm the license that applies to your situation.
Multisculpt's expanded shape key handling is noted for version 2.1 and Blender 5 and above. In that setup you can transfer deformations to a new shape key or to the basis, and account for deformations coming from existing shape keys. On supported versions this gives you control over how sculpted or painted changes land in an object's shape key setup. The broader ability to preserve shape keys across the multi-object workflow applies more generally within the supported Blender range.
Also in Modeling for Blender.

by jefftml
Add Positive Cube is a Blender add-on that adds a cube with its origin positioned at the corner. Handy for scaling while keeping the origin on the ground or against a vertical surface.

by Jayanam
JRemesh Tools is a Blender addon that remeshes existing meshes into quad-based topology. It supports Instant Meshes and Quadriflow, and works non-destructively by creating a new remeshed object while hiding the original.

by Erasers45-Studios
Voxelvision 4 (Formerly Blockblender) is a Blender addon that converts any 3D model or image into Minecraft blocks in real-time using geometry nodes. It also turns text into blocks and generates gradients.

by Mihai Dobrin
Petik - Retopology Patch Maker is a Blender add-on for building low-poly quad meshes. Click a high-poly surface to define geometry patches with up to six sides and a variable number of vertices on each side.

by RomainGuimbal
Surface Psycho is a NURBS editor for Blender that brings non-destructive surface design through GeometryNodes modifiers. Trim, project, interpolate, and connect surfaces and curves with continuity control, plus STEP and SVG export.

by Community
LoopTools is a mesh modelling toolkit for Blender that gathers several tools to aid modelling. It was previously part of Blender 4.1's bundled add-ons and is now offered as an extension, provided as it is with limited support.

by Community
Extra Mesh Objects is a Blender add-on that expands the Add > Mesh menu with additional mesh object types. Previously bundled with Blender 4.1, it now ships as a standalone extension for Blender 4.2 LTS and newer.

by nickberckley
Bool Tool brings quick boolean operators to Blender for hard-surface modeling, covering brush booleans, destructive auto boolean cuts, and workspace tools that carve objects with custom shapes in both object and edit modes.

by Community
Extra Curve Objects is a community add-on for Blender that adds extra curve object types. It lives under View3D → Add → Curve → Extra Objects and was previously part of Blender 4.1's bundled add-ons.

by MACHIN3
MESHmachine is a mesh modeling addon for Blender focused on hard surface work without subdivision surfaces. It fuses and unfuses surfaces, creates variable fillets and washouts, edits bevels, and details meshes with plugs.

by Community
A.N.T.Landscape is a Blender add mesh add-on for generating landscapes and displacement. Originally a bundled add-on in Blender 4.1, it's now offered as-is with limited support, accessed from the View3D sidebar's Create tab.