3D

Navmesh Area Eraser 3D
by flavelius
Allows removing areas of a navmesh defined by scene-placed AABB-nodes (also provided by the addon). Only removes whole polygons whose points fall inside the AABB, does not clip them to their precise bounds (for now?) - see screenshot Mainly useful to remove unused floating islands that tend to almost always be generated when baking heightmaps. Quick How to: Add 'AABBNode's (=areas of exclusion) as children of a NavMeshInstance and select the NavMeshInstance. Next to the Bake button in the men...

Scene Builder Level Design 3D
by veryseriouscatrelate
A level design system for efficiently building 3D scenes in Godot. Please see the README in the GitHub repository for more information. The version in the Asset Library will likely lag behind the GitHub repository, I recommend installing SceneBuilder as a submodule, then manage updates with Git.

GoldGdt 3D
by ratmarrow
Character controller add-on for Godot 4 that simulates the movement found in the GoldSrc engine. Instructions can be found on the GitHub repository.

PolygonCircleGen 3D
by jitnaught
Generate circles for a CSGPolygon3D, which can be useful for creating tunnels using a Path3D

Destronoi
by georgepower
A procedural mesh fragmentation algorithm that allows for the fragmentation of RigidBody3D objects. When triggered, the object can be swapped out with pseudorandomly generated fragments to simulate destruction.

Card3D
by drsteele91
This is a simple and handy library for managing 3D cards in Godot. With drag-and-drop support, you can easily move and reorder cards within and between collections. Look and feel inspired by Hearthstone. This library is designed to be flexible and extendable for any card game. It offers a basic framework that you can easily adapt to suit your specific needs.

Beholder
by mburkard
Asset providing a custom camera node with movement and utilities. Features - Keyboard movement controls - Game-pad movement controls - Mouse movement controls - Configurable projectile

Ultimate Character Controller (UCharacterBody3D) 3D
by chatoguy1
Custom Godot CharacterBody3D node provides a more feature rich FPS controller template. The controller is based on Ultimate First Person Controller Tutorial by @Lukky on YouTube.

Wave function collapse 3D 3D
by lepungo
This tool allows you to use Wave function collapse algorithm in 3D. It adds an editor window for setting up objects and their rules. Detailed user manual in GitHub repository.

AutoMat plugin - automatically create and assign
by rytelier
Plugin that allows to automatically assign materials to selected mesh files and create materials from selected textures, with automatic shader parameter assign.

Image to terrain tool 3D
by angelqba
This addon allows you to create a terrain from an image. It uses the layers of an image and constructs the geometry using each pixel color. Currently, it supports a "terrain" layer, and a "water" one. See included images in the demo folder. The image must be in TIFF format, uncompressed.

Godot360
by cykyrios
This tool provides a camera that supports non-standard projections, such as fisheye, panini, and more. Uses multiple cameras, and is therefore more expensive to render.