ambientcg.com

Over 2,000 PBR textures, HDRIs and 3D models in the public domain (CC0).
Strengths
- CC0 license: no attribution, free commercial use
- Quality textures up to 8K
- Works with Blender, Unreal, Unityβ¦
Limitations
- Fewer 3D models than textures
- Very heavy files at high resolution
- Rather bare interface
