Picnik is an online photo editing tool and it rocks! If you don’t have software like Photoshop to edit photos with, this might be just the ticket for you. I’m mentioning this site because before I got Photoshop, I tried every free image editor I could find and they were all unsatisfactory. You can do a whole lot with Picnik, however. There’s a dashboard with the usual editing stuff, like exposure, color saturation, and cropping, then there’s a dashboard with fun stuff like vignetting, lomo-izing, etc. You can then save to your computer or upload directly to Flickr, Picassa, or Facebook.
I’m going to give it a bash while I’m on vacation and away from my awesome Photoshop.