Google's Picasa is a wonderful free program for photos. I have PaintShopPro and PhotoShop, but I use Picasa more and more for regular things like resizing, cropping, adjusting colours and such. Picasa also allows me to very quickly make collages, upload to a picasa web album with good privacy settings, and so forth. I can automatically upload photos from Picasa to Facebook and Blogger too.
http://picasa.google.com/