Deleting Duplicate Folders

Can anyone make a recommendation for software that will allow me to delete duplicate images on my hard drive? Is there anything that will delete dupes for photos that have the same content but may have different names? Is there anything that works like iPhoto in the sense that I can see each image before I choose to delete them?

Is there anything that will show me the location for each image so that I can manually find each of the respective photos and their folders in order to possibly delete other data that may also be duplicate in these folders?

Thanks,

Jonathan