Poliigon – A great library of materials for artists.
The great amount of high quality PBR textures from Poliigon makes my inner artist very happy as it is a great resource to quickly achieve photoreal renders.

Architectural – 16
Bricks – 35
Cobblestone – 7
Concrete – 82
Fabric – 27
Food – 5
Graphic Designs – 42
Ground – 52
Grunge – 33
Marble – 88
Metal – 35
Nature – 67
Plaster – 28
Rock – 25
Rust – 35
Stone – 7
Streets – 187
Surface Imperfections – 94
Tiles – 59
Wood – 104