If you are serious about editing photos, and may even make a career out of editing, consider paying for software.
GIMP offers a lot of the same features that a paid software like Photoshop would offer such as painting tools, color correction, cloning, selection and enhancement. It stands for GNU Image Manipulation Program. With over 150 one-click photo effects, brush tool, and quick mask tools, and more, On1 Effects allows you to manipulate your photos extensively. On1 Perfect Effects is like a free version of Adobe’s software.Fotor will also let you import raw files and even add layers, like Photoshop.