It's The GIMP!

Okay, so it's not called "The" GIMP, it's just called "GIMP". GIMP is a free photo editing piece of software. Photoshop currently costs $10/month. This isn't bad if yo have a business and make money off of your work, but if you're a student or hobbyist, you might want something you can use for free. GIMP works differently than Photoshop, but you should be able to figure it out if you spend a little time on it. You can download GIMP here. Also, if you need to finish a project at home, this is a great way to do it using free software.