Seamlessly tiling normal or displacement maps are great for easily adding details to models. You can create these maps yourself by sculpting on a Plane, using the Tiling feature.
Blender Secrets - (Updated) Sculpt Seamless Tiling Details for
Creating UVs and Tileable Textures for a Snowy Victorian Street
Red Crystal Ground Texture, Free PBR
Tiling sculpting? - Feature Request - Nomad Sculpt
How to edit an image texture in the 3D software Blender - Quora
ArtStation - 350+ Fabric Displacement Map (Alphas) for ZBrush
Creating Tileable Textures In Blender With Sculpting
Seamless Brown Leather Texture + (Maps)
888 Detail Tileable Normal Maps - SKIN PACK 2 (51-100)
3D graphics eBook - Course Materials Repository
Gauze Cloth 2 Textile texture, Patterns in nature, Gauze
100 Tileable Displacement/Alpha Patterns Part 2
Tiled Floor 001 Texture • Poly Haven
Modeler
100 Tileable Displacement/Alpha Patterns