Order Free Operation Christmas Child Materials
PlasticFree is a database of plastic alternatives for designers
31 Days of Learning with Free Materials - The OT Toolbox
TextureCan - Free PBR Textures and CC0 3D Models
Another 6 Websites for FREE Textures and Materials
7 Ways to Get Free Building Materials - wikiHow
Download hundreds of PBR materials for free
7 Awesome Sites for Free Blender Textures
Free SketchUp Textures