Cropping images is one of the most basic, but also most important tasks in photography and (lately) image processing. A good image can become stunning when, through careful cropping, uninteresting parts are dropped, and the remaining parts are re-composed to look dramatically better.
Many photo management and -processing applications nowadays provide basic crop features. As most professional photographers can attest, however, these functions are mostly rudimentary in functionality and seem to be added as an afterthought. This is a problem because, in our experience, cropping a photo can do more to the way your images look (good or bad) than any other step (including color processing).