The app basically searches for any similar or duplicate photo, and then gives you the option of getting rid of them. It's important to note that the program will not delete anything without your permission.
The program will analyze the following photo formats: JPG, BMP, GIF, PNG and TIFF. All photos in these formats will be analyzed to see if they are duplicates or not. You can scan whatever you want... various folders at once, your hard drive, etc.
Awesome Duplicate Photo Finder is a very useful tool for users with a ton of photos on their hard drive who want to get rid of any copies.