CropSmarter

CropSmarter lets you remove entire objects from your photos. Simply open a photo and use your finger to roughly outline the object to be removed. CropSmarter takes care of the rest; it identifies the entire object in your photo (and not just the part you outlined with your finger) and removes it, replacing it with black.

CropSmarter also gives you the option of doing a plain, old rectangular crop if you so choose.

The available commands are listed at the bottom of the screen:

take - Take a photo with your device's camera and crop it.

open - Open a photo stored on your device and crop it.

crop - Crop the selected photo in the old fashioned way, with a movable and resizeable cropping rectangle.

crop+ - Crop entire objects out of your photo. Use your finger to roughly outline the area of the photo you wish to remove. Small blue dots will appear where you've drawn. When you pick your finger up off the screen, CropSmarter will remove the selected object from the photo and replace with black. You can repeat as many times as you wish. Note that the object removal may take 10-30 seconds, depending on the size of the object to be removed.

save - Save the edited photo to your camera roll.