GIMP is not Adobe Photoshop CS4, but it is an amazingly powerful and efficient open-source bitmap-­editing package that can look just as confusing as Adobe Photoshop CS4if you open all its floating toolbars and sidebars.

You’ll need to get used to its nonstandard menus. If you make your living from graphics or photo editing, you’ll probably go commercial, but GIMP gets the job done free.  Get it here: