Free 3D Models download only
Sell & Buy 3D Models, 3D Printings & VR
Google SketchUp’s 3D Warehouse. Some parts are printable, but most would need processing.
Beautiful models.
Free ready to print models and a place to sell you 3D work.
3D Files
Free Parts
Free 3D-printable models designed by Zheng3
Mechanical parts
Free Files
Free parts

NASA 3D Resources
Model of ships, moons and planets!/designs
Free STL Files
Free ready to print models and a place to sell you 3D work.
Upload and download 3D print files
3D printable file repository
Japanese 3D Printing Marketplace
Design, Prototype, Buy and Sell custom products at Shapeways; The world’s largest online 3D Printing Service, Community, and Marketplace.
Free Files
3D Printing Marketplace
Thingiverse is a great site for parts to download and learn about 3D printing.
Tested printable designs for your desktop 3D printer
Free parts
Free parts
Free Files
Free STL Files

Airwolf / AXIOM 3D Printers, 3D Printing Software, and 3D Printing Accessories
Printers and materials
Makerbot Replicator+
Get RepRap kit from Josef Prusa – Original Prusa i3 kit
Humanity’s first general-purpose self-replicating manufacturing machine.
Well developed and established printers.

Banggood is a wholesale site with a big selection of parts.
Ebay Seller that ships from Florida with affordable 3D printer parts.
Ebay Seller that ships from Texas with affordable 3D printer and CNC parts

Cura prepares your model for 3D printing. As it’s open source and free to use.
An open-source parametric 3D CAD modeler
Design, test, and fabricate in a single tool

The Programmers Solid 3D CAD Modeller.
Create accurate 3D models with reality capture
3D printing slicing software for $149.00 with access to full-time professional support staff.
G-code generator for 3D printers. Free to use. Developed by Alessandro Ranellucci.
Tinkercad is a simple, online 3D design and 3D printing app

A good source for filament and parts.