Endless free 3D sculpts
Thingiverse is a great place to find free printable miniatures
The Gurt Files
Thingiverse creator Arian Croft duchmogul creates some superb models and a prolific one too. He is the creator of the cave lurker that we printed for our Battle Lounge mascot “Gurt”
A Great Artists
Miguel Zavala (mz4250) has some amazing sculpts for use in your campaigns. A lot of his work are sets with many different models in each one.
Design Your Own Miniatures
HeroForge is a site that allows you to design miniatures for free, and you can then either buy them, buy the file to print yourself (if you have a 3d printer) or just create them online for fun. This is a good tool for all players (and gamemasters) alike!
Do it yourself
Tinkercad is a free fantastic online sorfware program that lets you quickly and easily build 3D structures, perfect for designing doors and windows for your XPS buildings