http://www.lenzula.com has some nice patterns and a BOM going on now. Christine Thresh is another paper piecer that had interesting patterns. Silver Linings Originals and Claudia's Quilt Shop are great if you like realistic paper pieced animals. Siefert & Schartz used to have Zippy Designs and they published a magazine that was mainly paper-piecing articles but I think it has changed over the years and may even be gone.