Here are a few that I use. I also have checked out quilting books and magazines at the public library. Sometimes even the older books are kind of fun. DH found one at a second hand bookstore that is wonderful.
http://quiltville.com/index.html
http://books.google.com/books?id=fUg...oANaRGYg#PPA93,M1
http://www.freequiltpatterns.info/
Good luck!