Digital photography is all the rage these days, so it's too bad that the standard photo-editing software, Photoshop, runs close to a thousand dollars. It's not exactly something your mom will need or want to crop and edit photos of the family dinner. For that, there are better options, such as Picnik.
Picnik isn't just cheap: It's free! It's a great, robust online photo editor that lets you crop, resize, and edit photos right in your browser. Sure, it doesn't have the millions of features that Photoshop has, but you don't need to take a class to learn how to use Picnik. Also, did I mention that it's free?