http://www.emblibrary.com/EL/Browse....ategory=Quilts
I'm working on a quilt right now using some quilting designs from Embroidery Library. Many of the quilting designs are only $1 if you buy them separately.
If you see something you want put it on your wish list, they often have Wish List sales and you can buy anything on your list for 50% off. And they often have other sales as well. I've been very happy with everything I've purchased from them.