A great, free resource that I like to take advantage of when designing is Project Gutenberg. Project Gutenberg’s mission is “To encourage the creation and distribution of eBooks” and most are out of copyright, so if you’re looking for some filler text for design purposes, it’s an excellent place to look without worrying about licensing.

Also, I like to search through some of the books for images when I’m looking for something with a vintage or antique feel. Like with the text, you don’t have to worry about the copyright info.

Also, if you have an eReader, it’s a great place to look for free books!