Granny squares http://crochet-mania-grannysquare.blogspot.com/2009/11/commemorative-large-crochet-heart.html
Granny Square Tote pattern
Crafting Ideas / Crochet Granny Bag (The instructions are in dutch, but are easily translated).
Chunky granny stash bag Crafternoon Treats
Crochet bag with video tutorials. Free pattern.
Zooty Owl's Crafty Blog: 13 Granny Squares Bag: Pattern
Crochet bag ...(I would like this better with a smaller handle like a hand bag)