There are several websites where you can find free down-loadable 3D models for various purposes, such as personal projects, education, or even commercial use. Keep in mind that while many of these websites offer free models, it's important to check the licensing terms for each model to ensure you're using them in compliance with the terms of use. Here are some popular websites where you can find free 3D models:
3D Content Central
FREE 3D and 2D CAD Models of User-Contributed and Supplier-Certified Parts, Assemblies and more. https: //www.3dcontentcentral.com/
GrabCAD
Website: https: //grabcad.com/library
Thingiverse
A platform focused on 3D printing, offering a wide range of models from various categories.
MakerBot's Thingiverse is a thriving design community for discovering, making, and sharing 3D printable things. You can find many printable files and you can even share your design the community.
Usage instructions: Most thingiverse.com files have a Creative Commons license that allows you to use them for personal and commercial however double-check before you download them!
Website: https: //www.thingiverse.com/
MyMiniFactory
Similar to Thingiverse, MyMiniFactory provides a collection of 3D printable models.
Website: https: //www.myminifactory.com/
Sketchfab
A large platform where creators upload and share 3D models in various formats.
Website: https: //sketchfab.com/
CGTrader
Offers a mix of free and paid 3D models, covering a wide range of categories.
Website: https: //www.cgtrader.com/
TurboSquid
A marketplace for 3D models, with a selection of free models available.
Website: https: //www.turbosquid.com/
Free3D
A repository of free 3D models for use in various applications.
Free3D is a page consist of 17,000+ free 3d models in category such as vehicles, plants, architecture, human anatomy, etc. you can download them in 3d files like .max, .obj, .fbx, .3ds, etc.
Usage instructions: For Stock Media Products, Free3D grants to you a non-exclusive, perpetual, worldwide right and license to copy, distribute, reproduce, adapt, publicly display, publicly perform, digitally perform, transmit, broadcast, telecast, advertise, create derivative works, and market Stock Media Products within Creations except for the ones marked with an “Editorial” notice on its Product Page.
Website: https: //free3d.com/
Clara.io
An online 3D modeling and rendering tool that also features a library of free models.
Website: https: //clara.io/library
NASA 3D Resources
NASA provides a collection of 3D models and textures related to space and scientific exploration.
Website: https: //nasa3d.arc.nasa.gov/
3D Warehouse (SketchUp)
A platform with a large collection of models specifically designed for use in SketchUp.
Website: https: //3dwarehouse.sketchup.com/
Archive3D
A repository of free 3D models, primarily focused on architectural and interior design.
Website: http: //archive3d.net/
Remember to review the licensing terms for each model you download to ensure you're using them appropriately. Some models may have restrictions on how you can use them, such as for non-commercial purposes only or with attribution. Always give credit to the creators when required.