There are literally thousands if not millions of free crochet patterns available online but there is one place that has all sorts of categories from afghans, jewelry, baby patterns, men's patterns, knitting patterns and more.
In addition the site is always adding new patterns all of the time!
I really like their baby slipper patterns and booties plus the holiday patterns
The links are laid out by theme, and they also provide many great techniques. Them items make great gifts plus you will find many items to make for charitable organizations.