I was reading an article on All3dp.com about free CNC resources and I thought I would share the sites that I found best from their list.
https://dxfprojects.com/
https://3axis.co/
https://filescnc.com/
https://www.zenziwerken.de/
https://obrary.com/collections/open-designs
https://www.inventables.com/projects
Enjoy!