I came across this neat image editing tool and thought it may be of some use, it is called PhotoWipe.

Have you ever taken what you thought was the perfect photograph, only to find that something in the image that you did not want there? Now you can “erase” objects or obstructions from digital photos merely by “painting” over the object, and letting the program recreate the lost detail.

This program is donationware. It is free to try, but the author accepts and encourages donations towards further development.

The program can be downloaded here