Seriously, your gran could do this. Picnik offers one-click adjustments of exposure and colour temperature, all the features and effects are self-explanatory, and there’s a wide range of cool effects, such as vignette, HDR, blemish removal and even teeth-whitening. While the basic service is free, some of the best features are reserved for (paying) premium members.
Photoshop’s online mini-me is aimed at those in need of a quick fix, like snappy red-eye reduction, softening of shiny foreheads or brightness and contrast adjustments. It lacks some of the more advanced effects and filters in Adobe’s professional package, but also lacks its big brother’s astronomical price tag.
Twirl, bulge, pinch, stretch and squish. Fotoflexer lets you supersize yourself or lose your holiday belly instantly. There’s also distortion, layer and touch-up tools and low bandwidth consumption eliminates bothersome buffering.
SumoPaint offers comprehensive painting and design features and stunning effects for some truly spectacular artwork. A favourite with the fantasy/manga crew it creates spectacular hybrid photo art, but the usual photo-tweaking tools are all there, too.
Phoenix Image Editor from Aviary is one of the more established Photoshop alternatives, offering advanced editing and layer support for professionally edited photos completely free of charge. It looks and feels like a desktop app, albeit a slightly dated one. Borderline essential for Chrome OS users.