I find that QuiltersCache, Marcia Hohn's site, has the most quilt blocks and even notes which ones are PP when you look at the alphabetical listing of the block names. She has an incredible assortment of traditional and original blocks, plus at least one photo of the block (and sometimes quilts or wallhangings) besides all her marvelous graphics. There are detailed instructions and fabric requirements noted on most of them, plus a bunch of tutorials. AND she does a great blog, "Letters From Mama Bear" - I just wish she would archive them, they are so interesting! Check it out.