I just discovered this cool photo editing site, you may already have heard of it, it's called Picnic, and it's free. http://www.picnik.com/app#/home/welcome
I think it has a lot of great things you can do with it, and it's especially helpful for making ads that you publish on other sites and blogs. Here's a 125 x 125 ad I just created this morning, it was really easy! Check it out!