BEST STL MODEL SITES

Thingiverse

Grabcad

Sketchfab

Autodesk 123d

CGTrader Marketplace

My Mini Factory

Yeggi

Pinshape

XYZprinting 3D Gallery

Dremel Idea Builder

YouMagine

Yobi3D

STL Finder

3DExport

Cults

Zortrax Library

New Matter

Rinkak

3DShook

Rascomras

Threeding

Repables

Libre3D

3Dagogo

Shapetizer

The Forge

Redpah

Trinpy

Polar Cloud

3D Warehouse R

STLHive

NASA

NIH 3D Print Exchange

Instuctables