Getting bored with your usual iPhone photo apps? Try Noir ($3) on for size. This app allows you to strip your entire photo to black and white, then shade back in parts of your photo with a touch of your finger. You can even add some thematic preset tones to your pics — in sepia, silver, blue-gray, or chartreuse — to further impress your mobile photo nerd friends.
Get a closer look at the app in action in the gallery.