Cropping tools are among the simplest and most widely-used photo editing tools. You can use them to improve composition, adjust ratios of sides for printing, or get rid of unwanted objects around the edges of a picture.

It's an irony of our digital age that we use the latest imaging technology to make our photos look as if they were taken with an ancient camera. But who are we to argue with progress? The truth is, Instagram is a photographic phenomenon and its boxy, filtered photos are deeply embedded in our culture. More than that, there are dozens of services popping up that can transform Instagram images into magnets, wall art, stickers and more -- all with the unique look that only Instagram photos provide.