Flickr integrated web-based photo editor Picnik. This way you can click Edit on top of your image uploaded to Flickr to switch into a photo retouching mode, where you can then crop, resize, adjust colors, apply effects, add text and clip arts, and more. Most features are free, though you need to upgrade to Picnik Premium for ~25 bucks/ year to use stuff like Polaroid effects. While you won’t be able to do advanced PhotoPaint/ Photoshop things, this whole thing works quite brilliantly already.
Yahoo!, Flickr, Picnik, Image Editor, Web Photo Editor
Source:→ Google blogocped