Free texture libraries to spice up your drawings!

Here is a short but comprehensive list of texture libraries that you can use to lay under your line drawings to give it a more tactile feel, (Gwen's futuristic bg image is a good example ) but you can also use textures for your characters and props...:)

http://cg-india.com/free_textures.html
http://textures.forrest.cz/
http://www.cgtextures.com/