I use Photobucket to store and edit my digital photography. I find it easy to use and organize (and it's free until you get to large amounts of storage, and even then the price is reasonable).
One of my favorite applications is "fresco" which essentially takes a photo and makes it look like a fresco painting. It's especially good if you get a great pic that turned out slightly blurry, because the frescoing process makes it beautiful.
Here are some of my favorite pics of Gypsy, al fresco.