Page Curl Pro is a surprising application for Adobe Photoshop (and other compatible editors), with which you can apply all types of doubling and folding effects to your photos. The options and varieties are many, with sepctacular results. Also, Page Curl lets you edit and apply the normal filters to images, as well as adjusting the basic parameters of brightness, contrast etc. As is usual in good graphics editors, all changes are done in real time, and are only applied to the original image when you say so.