Skitch by Evernote

Skitch allows you to annotate on photos or images and save them to Evernote for future access. The premise behind Stitch is to draw attention, say it with fewer words and move projects forward. You use the annotation and markups (shapes and arrows) to quickly draw attention to what's important in the photo. Skitch can be used on your computer or mobile device. The video below shows Skitch in action.