Here's a couple more sites:
http://www.chestercountyquilting.com/FavLinks.html
http://www.christaquilts.com/index.php?main_page=page&id=8&chapter=0
http://www.quiltstock.com/freepatterns.htm
http://www.jankrentz.com/free-lesson.php
http://www.borntoquilt.com/catalog/index.php?cPath=172&osCsid=912314f893b20fa229656a885cd88237
http://www.sewaquilt.com/quilt-blocks.html
http://www.thimblesandquilts.com/freequiltpatterns.htm