Rigacar is a free addon for Blender created by digicreatures. It is designed to fulfill the following goals: generate a complete rig as quickly as possible (actually few seconds) for standard car models, provide tools to automate wheels animation, allow efficient animation baking to be able to export animated models into real time renderers

RBC is a Physics-Based Vehicle Rigs in Blender created by akastudios. This addon will allows you to create realistic physics-based vehicle rigs in minutes! With its intuitive interface and advanced customization options, you'll be able to quickly and easily set up and tune your vehicle rigs to achieve the perfect behavior.

Sanctus-library-addon for precedural materail created by sanctuslibrary. The addon include a wide variety of precedural material, geometry nodes generator, images decays and baking tool.

BlenderKit is an online database of materials, brushes and 3D models which you can search, download, upload and rate directly from the add-on.