If you are interested in an application to manipulate images and photos, then I recommend the Gimp. The Gimp is an acronym for the GNU Image Manipulation Program. It is similar to Paint Shop Pro and other graphics applications.
The Gimp is currently at version 2.2.3 and is available for download at gimp.org . It is a cross-platform application, which means it is available for multiple operating systems (Windows, Linux, Mac OS X).
For new users the interface might be confusing, because the Gimp uses multiple windows: one for the tools, one for tool options, one for image layers, etc., one for any other dialogs, and one for each image you are editing. But, the Gimp is completely customizable to make it any way you want. The way I like it is with all the tools and dialogs in one window, but in tabs on the right of the screen, and then a window for each image I am editing.
When you get more advanced using the Gimp, you can also create scripts to perform automated tasks for yo...