This isn’t going to replace photoshop anytime soon, but check out PXN8, an HTML/CSS/Javascript based image editor. You can crop, adjust color balance, remove red eye, rotate, and a bunch of other basic image editor tools are also available. Pretty slick stuff and potentially handy if you find yourself in front of a computer that lacks an image editor. It’s also available for licensing for incorporation into your existing project or to run on your own servers.