Free Textures

Overview
OpenGameArt

Links

 * http://blog.adrianoponte.com/2011/10/21/downloads-textura-hdri-materiais-modelos-referencias-cg-blender
 * http://freetexturesite.blogspot.com/
 * http://www.lughertexture.com/
 * http://resources.blogscopia.com/
 * http://www.texturemate.com/
 * http://www.cgtextures.com/
 * http://www.texturepilot.com/