MugTug Darkroom is an online browser based application to retouch your photos. Its a simple application that gives your the basic features to retouch your photos. You can either upload a photo from your local disk or specify a url to an image (for example from picasa or flickr). Once you have finished editing your photo it can be download it to your local disk or save it at MugTug.
This application is very handy for people who travelling and have no access to an photo editing software. The application is cross browser compatible and hence accessible on Windows, Mac, Linux or any other OS that support the popular web browsers.