Free Download: 9 Wood Materials - BlenderNation
Free Materials Bundle - Blender Market
Any good free materials libraries online? - Blender Stack Exchange
Any good free materials libraries online? - Blender Stack Exchange
Free Download: 10 Paper Materials - BlenderNation
Top 10 CGI Material Libraries for Blender | Vagon
Procedural Skin | FREE 3D human materials | BlenderKit
Blender Material Nodes Explained · 3dtotal · Learn | Create | Share
Material Library VX Free Add-on for Blender || Procedural Material | Blender tutorial, Material library, Blender
BlenderKit - Free Modelled and baked materials
80 Procedural Materials for Blender 2.8 - YouTube
Free Material Pack 1 to 11 (99 Materials) are now available! Link in the comments : r/blender
Materials Preset Collection - Materials and Textures - Blender Artists Community
Blend Swap | Meta's Massivest Materials Library Addon
Free Material Pack: Food (Link in the comments) : r/blender
Top 10 material libraries for Blender artists - Artisticrender.com
15 Free PBR materials with plastics, polystyrene, and tech • Blender 3D Architect
