Tier S –
Printable- https://printables.com/
Makerworld- https://makerworld.com/
Thingiverse – https://thingiverse.com
Cults3D – https://cults3d.com
My Mini Factory https://www.myminifactory.com/
Tier A –
CGTrader (Free & Paid) – https://www.cgtrader.com/
Thangs – https://thangs.com/
STL Finder (Search Engine)- www.stlfinder.com
Yeggi STL Finder (Search Engine) – http://www.yeggi.com/
Tier B –
Fab365 (Foldable model, Free & Paid)- https://fab365.net/
GameBody – https://www.gambody.com/
Tinkercad Models – https://www.tinkercad.com/things
Instructables (Projects related to 3D)- https://www.instructables.com/
Lithophane – http://3dp.rocks/lithophane/
Zortrax – https://library.zortrax.com/
Tier C –
YouImagine – https://www.youmagine.com/
3DShook – http://www.3dshook.com/ (Registration Required)
Free3D – https://free3d.com/
Color 3D Gallery – https://3d-gallery.xyzprinting.com/en-US/gallery/
Redpah – https://www.redpah.com/
3DKToys (Paid) – https://3dkitbash.com/
Pinshape – https://pinshape.com/
Tier D (Some designs not specifically made for 3D printing) –
NASA Models – https://nasa3d.arc.nasa.gov/
3DSky (Furniture 3D Models) – https://3dsky.org/
Unity Asset Store – https://assetstore.unity.com/
Turbo Squid (3DMax OBJ Files – Paid) – http://www.turbosquid.com/
List above is gotten from the internet & modified based on our preferences.
awesome