My name is Maelor, and I'm the founder of ArchiveCG.
Archivecg is a website that provides you with free PBR Textures, 3D Models and more tools under the under the CC-0 license meaning you can use them for any purpose, even commercially.
The library contains more that 250 assets and is constant growing.
All the assets are full PBR, or Physically-Based Rendering with metalness / roughness workflows. You can download them in 2k, 4k and in some cases even in 8k resolution. All the textures have been made using Quixel Mixer, Substance Designer, Substance 3D Sampler and Material Maker. As for the 3D Models, they've all been modelled in Blender and later textured in Substance Painter.
If you wish to stay up to date with the updates, request future assets... feel free to join my Discord server.
Any feedback and suggestion would be appreciated.