Here's my two top picks for Photo Editing software. These tools can be alternative to Photoshop. They are both powerful and can deliver the same results. Link hidden: Login to view
PIXLR - one of my favorite. It is an online and offline editing tool that works in your browser. What makes it so unique is that it offers a lot of the same features as Photoshop. The best part is, It;s FREE.Link hidden: Login to view
Many recommend GIMP for all photo editing needs, especially if you need things like layer support, magic wand style tools and a huge library of plugins. Unfortunately, because GIMP comes with a ton of features, it's often complicated to use and requires a bit of a learning curve (but then again, so does Photoshop).