If you've ever wanted to turn your favorite vacation photo or a shot of your puppy into nail art, now's your chance. NailSnaps (free) allows you to use your camera roll or a new image to create customizable manicure designs for each finger. Once you've designed your masterpiece, you can purchase it and have it sent to your home. Not so crafty? You can also browse (and shop for) premade decals from your friends and nail artists.