Removing an object on a photo with GIMP. Tutorial to remove objects (or people) and restore the portion of the background they hide in a photo with the Resynthesizer plugin.
An impressive video has been posted on Youtube to show how, with Photoshop, it is possible to delete objects in an image automatically, without any design work. The same can be done with The Gimp in fact and for longer (it is not impossible that the same algorithm has been reused). Photoshop Tutorials: Toolbox Reference. Rollip - Online Photo Effects.