Adobe Photoshop Express is an online (web-based) version of the widely popular image editing software : Adobe Photoshop.
It is currently in beta stage.

You can perform some quick edits to your photographs like rotate, crop and other basic image tweaks.
Have a look at the screenshot below :

Looks slick and cool !

Visit [Adobe Photoshop Express] for more info about Photoshop Express.

There is also an option to signup for a free account,
which allows you to upload and share upto a maximum of 2GB of images.

Enjoy !