Texture Web Sites

[kimey]

Not sure if you know this one. I'll post anyway.

http://texturelib.com/

[novice42]

For a list of many free texture sites see http://arnokohl.wordpress.com/2011/03/03/texuren-1/ and http://arnokohl.wordpress.com/2011/03/06/texturen-2/. The links are commented (though in German only)

[Mark Oliva]

We have a large number of free textures for free download and commercial as well as personal use in the Vintyri (TM) Cartographic Collection on our website. The material all is released under the Open Game License 1.0a.

http://www.vintyri.org

[jaerdaph]

Today on the Official Google SketchUp blog they featured A Treasure Trove of Textures with a link to an article on John Pacyga's SketchUp For Landscapes blog featuring links to a ton of sites with seamless textures that can be used with SketchUp, Photoshop, GIMP, CC3 and more.