3D Printing
For makers and fabrication hobbyists.
Communities for 3D printing enthusiasts to share prints, swap settings, and troubleshoot. Reddit hosts some of the largest communities, with active discussions for everything from miniature printing and functional prints to resin work and printer builds. Good for setup help, material recommendations, and showing off what you made.
Communities

CGTrader is the world's preferred source for 3D content. Join CGTrader community to buy & sell 3D Models, find freelance projects, showcase your art, get feedback and recognition!
r/3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.

A community dedicated to share and discuss 3D prints that have a specific, practical function or use in everyday life.
This subreddit is dedicated to 3D Printing Miniatures for Tabletop Games. Got a print you want to show off? perhaps you're looking for files? This is the subreddit for you.
A community dedicated to the discussion of 3D printed guns and related topics.
The community of r/FixMyPrint will help you fix your 3D printer settings for the most optimal prints.

A group that is dedicated to any and all people looking for help or encouragement with 3d printing.
This is a welcoming place to share your prints and chat with other hobbyists! Check out the sticky thread, and remember you can search old posts! Most importantly, have fun, and happy printing!

A community group for scanning professionals in the entertainment and civil industries. Share your latest work, links to research and tutorials, job postings, new technology and software and hardware equipment reviews.

This networking group is for the free exchange of business, technical and scientific knowledge in the centuries old tradition of foundry art and industry and the advancements in Metal 3D Printing and Metal Additive Manufacturing. Please feel free to post questions, jobs, projects and advice specific to metals.

SoliForum is a independent community created to share ideas and creations that others can reproduce and improve on. It is also a place to help others and receive assistance with 3D printers and other closely related subjects. You may also buy, sell, or trade physical things with other members of the community, such as, but not limited to, printer parts, filament, software, kits, and complete units, but know that you assume all the risks that are associated with transactions with other members.

People interested in Technology, Applications & Market of Additive Manufacturing (AM) which also were referred as 3D Printing, Rapid Prototyping, Solid Freeform Fabrication, Rapid Manufacturing, Desktop Manufacturing, Direct Manufacturing, or Layered Manufacturing, Generative Manufacturing, Layered Manufacturing, Solid Free-form Fabrication, Rapid Prototype, Tool-less Model Making, Metal casting, 3D Metal Printing, Metal Additive Manufacturing etc. These technologies have crucial benefits for the medical sector , professional applications, engineering, architecture, and modeling, etc..,used for 3D Printing (Materials, Design & Engineering, Post Processing, Electronics and Factory Integration), 4D Printing & Meta Materials,etc..
Welcome to the PRINT 3D forum

Subreddit dedicated to creating a community around users of SLA and other resin-based 3D printing systems. Feel free to ASK questions, POST cool prints, DISCUSS hardware designs, and SHARE anything you think is relevant to resin-based printing.

Want something printed but can't afford a printer? Have a printer that just collects dust? Trying to sharpen up your modeling skills? Help each other out! This subreddit is for people with printers who are willing to design and print stuff out for others and send it to them, and for people who can't get a hold of a printer and want something printed!

More and more board and card games are having pieces upgraded or customised at home with 3D printers. This is a place for us to share those things.

Companies, latest trends, B2B, knowledge transfer, scientific contributions, ... post and share ONLY topics concerning Additive Manufacturing & 3D Printing technologies related to the medical field. NO MARKET STUDIES. This group also aims to show to experts and companies as well as medical doctors that these technologies have crucial benefits for the medical sector. Thanks to senior experts in various fields of expertise and especially 3D Printing and Additive Manufacturing technologies, this group will help and guide you or answer your questions concerning those technologies, materials and applications.This group is also meant to bring together surgeons and engineers related to that topic.

The OpenR/C Project is a open and free-for-all initiative to create R/C projects that you can make yourself mainly using 3D Printers. In the words of Hackaday.com: "If you’re willing to dig, the OpenR/C group has more tips on printing for strength, printing nylon, and printing flexible filaments than any other single resource on the internet right now. These guys are relentless." If you are building one of the existing projects, want to create your own and have questions or thoughts you want to share this group is the place to do so.

Everything about Ceramic 3D printing (Wiki, Tutorials, News, Creations, Fun..)

A better Warhammer and Wargaming 3d printing Subreddit. If you are Reddit 3D printing community, this one is for you.
The World's #1 3D Printing Magazine for Beginners and Professionals
RepRap is humanity's first general-purpose self-replicating manufacturing machine. RepRap takes the form of a free desktop 3D printer capable of printing plastic objects. Since many parts of RepRap are made from plastic and RepRap prints those parts, RepRap self-replicates by making a kit of itself - a kit that anyone can assemble given time and materials. It also means that - if you've got a RepRap - you can print lots of useful stuff, and you can print another RepRap for a friend… RepRap is about making self-replicating machines, and making them freely available for the benefit of everyone. We are using 3D printing to do this, but if you have other technologies that can copy themselves and that can be made freely available to all, then this is the place for you too. Reprap.org is a community project, which means you are welcome to edit most pages on this site, or better yet, create new pages of your own. Our community portal and New Development pages have more information on how to get involved. Use the links below and on the left to explore the site contents. You'll find some content translated into other languages.

This group is a platform for 3D Modelers, 3D artists, designers, and sculptors to share their 3D Printed works. We encourage sharing of your finished 3D printed pieces, works in progress, your workspace, tools and general tips and tricks that relate to 3D printing for artists. Our only rules are no advertising, no spam and no links to random 3D Printing articles not related to art or design. We will delete any posts that are not relevant to the site, if you have any questions please send us a private msg. Thank You and welcome! For additional 3D Printing art resources check out the main site: www.mold3d.com