I use Lightroom from Adobe. It's pretty easy to use and you can download a 30 day trial to see how you like it. If you are on a mac you could check out Aperture (again, 30 day free trial). Also a good program. I chose lightroom because it works on both PC and MAC. So far it's been great for organizing my photos and correcting er, enhancing.... my photos.

"What can be asserted without evidence can also be dismissed without evidence." C Hitchens