3D FILES
https://www.3dagogo.com/
Free 3D Models download only
https://3dexport.com/
Sell & Buy 3D Models, 3D Printings & VR
3dwarehouse.sketchup.com
Google SketchUp’s 3D Warehouse. Some parts are printable, but most would need processing.
https://gallery.autodesk.com/
Beautiful models.
Cgtrader.com
Free ready to print models and a place to sell you 3D work.
https://cults3d.com/en
3D Files
https://3dprinter.dremel.com/3d-printing-models
Free Parts
http://zheng3.com/forge/
Free 3D-printable models designed by Zheng3
Grabcad.com
Mechanical parts
http://libre3d.com/
Free Files
https://www.myminifactory.com/
Free parts
NASA 3D Resources
Model of ships, moons and planets
https://store.newmatter.com//#!/designs
Free STL Files
https://pinshape.com/
Free ready to print models and a place to sell you 3D work.
Redpah.com
Upload and download 3D print files
Repables.com
3D printable file repository
Rinkak.com
Japanese 3D Printing Marketplace
Shapeways.com
Design, Prototype, Buy and Sell custom products at Shapeways; The world’s largest online 3D Printing Service, Community, and Marketplace.
Stlfinder.com
Free Files
https://www.threeding.com/
3D Printing Marketplace
https://www.thingiverse.com/
Thingiverse is a great site for parts to download and learn about 3D printing.
Trinpy.com
Tested printable designs for your desktop 3D printer
http://us.gallery.xyzprinting.com/
Free parts
Yeggi.com
Free parts
Yobi3d.com
Free Files
https://www.youmagine.com/
Free STL Files
3D PRINTERS
Airwolf3d.com
Airwolf / AXIOM 3D Printers, 3D Printing Software, and 3D Printing Accessories
3dsystems.com
Printers and materials
Makerbot.com
Makerbot Replicator+
http://www.prusa3d.com/reprap/
Get RepRap kit from Josef Prusa – Original Prusa i3 kit
Reprap.org
Humanity’s first general-purpose self-replicating manufacturing machine.
Ultimaker.com
Well developed and established printers.
PRINTER PARTS
Banggood.com
Banggood is a wholesale site with a big selection of parts.
http://www.ebay.com/usr/leap3d
Ebay Seller that ships from Florida with affordable 3D printer parts.
http://www.ebay.com/usr/zyltech
Ebay Seller that ships from Texas with affordable 3D printer and CNC parts
SOFTWARE
https://ultimaker.com/en/products/cura-software
Cura prepares your model for 3D printing. As it’s open source and free to use.
https://www.freecadweb.org/
An open-source parametric 3D CAD modeler
http://www.autodesk.com/products/fusion-360/overview
Design, test, and fabricate in a single tool
OpenSCAD
The Programmers Solid 3D CAD Modeller.
http://www.autodesk.com/products/recap/overview
Create accurate 3D models with reality capture
https://www.simplify3d.com/
3D printing slicing software for $149.00 with access to full-time professional support staff.
http://slic3r.org/
G-code generator for 3D printers. Free to use. Developed by Alessandro Ranellucci.
https://www.tinkercad.com/
Tinkercad is a simple, online 3D design and 3D printing app
SUPPLIES and FILAMENT
http://www.makergeeks.com/
A good source for filament and parts.
Seahorse 3D Printing 