Crochet Pattern Central (already mentioned above) is great for free patterns. Also check out the stitches and Instruction Tutorial Directory. (I happen to know the site very
Crochetville (already mentioned above) is a fabulous crochet forum; my favorite.
As for tutorials, your best bet would be to go to www.anniesattic.com
for their video tutorials AND http://www.crochetcabana.com
which has fabulous tutorials of all sorts for all things crochet.