Urban Elementz has quite a few free downloads. You just download the PDF and print 15 (or more) copies, then tape them together. They also have many really nice patterns for sale.
http://www.urbanelementz.com/
I also like Digitech Designs. They have a large selection also and they sell many of them at 50% off for the first 10 days they have them in stock.
http://www.digitechpatterns.com/default.asp
One of my favorites is Fantasia. I have several more but am not home right now to tell you the names.