Here are some of my favorite links. Some of these sites include links to patterns, crochet videos, or other crochet related things.
Bernat: http://www.bernat.com: This site has many great, free patterns!
Coats & Clark: http://www.coatsandclark.com/ - Free patterns
Crochet Geek: This site has many of the videos that accompany my posts about stitches as well as some fun patterns.
Crochet Guild of America: An amazing resource. CGOA organizes two conferences each year, provides support for local crochet groups, design contests and more!
Crochetville: A fantastic crochet community where you can find inspiration, free patterns, and answers to your crochet related questions.
Lion Brand: http://www.lionbrand.com/ - Free patterns for knitting and crocheting. The pattern finder makes finding your next project really easy!
Michaels Stores project area: http://www.michaels.com/Yarn-Needle-Crafts/projects-yarnandneedlecrafts,default,sc.html - Free crochet projects
Ravelry: http://www.ravelry.com - A great community of knitters and crocheters. Join a group, find patterns and keep track of where you are on your growing "to make" list.
Red Heart: http://www.redheart.com/ - Free patterns, giveaways, and more!