A sadly underfunded client of mine who can't get money for a full-blown version of Photoshop told me about Adobe Photoshop Express.
Express is the latest of of SaaS (Software as a Service) offerings. SaaS boils down to online versions of the kinds of software you're used to buying as a package you install on your computer. Like, say, Photoshop. But instead of paying $700 for the mega version, you pay nothing for this online version.
Makes photo editing on a budget a pleasure.
Watch out Picnik!