Picnik Online Photo Editor
Picnik is another handy online photo editor for those times there’s no Photoshop, Gimp, XnView, or Picassa around. Picnik allows you to rotate, crop, resize, edit color and contrast and save as JPG, PNG, GIF, BMP, PDF, and TIFF. There are also a few quick filters available and some tabs labled “Coming Soon” so I guess there will be more filters soon. You can also send your image directly to Flickr or email it to your website.
The only thing it can’t do that I really wish it could is add text to an image. That seems to be something lacking in all online image editors.