Whenever we think of photo editing, the first thing that comes to our mind is Photoshop. But, unfortunately Photoshop is something which not everyone can afford so they would have to look at some place else. One of the tools which they could take a look at is Pixlr.
Pixlr is an Online Photo Editor that can perform the basic editing functions like cropping, resizing, adding a white space etc. It may not have all the features of Photoshop and hence it is not a recommended substitute. But, with that said it is always good to give it a shot and see what you can achieve by playing around with it!