A free software to Clone
 

Here is a free small, easy to use software to cut off something extra in your picture that you don't like, with out using photoshop etc.
Time to remove the object from your picture, depends on selection area and result is OK for many instance that I tried, especially if you have not much post processing knowledge.

Free download remains alive for another 20 Hours or so.
So if interested check it quick. After all can't go wrong with free!

LINK

Downloaded it myself, late last night only tried it on one photo and it seemed to do a reasonable job on the bit I tried it on. Would still have needed to go in a tweak the result myself to add an extra bit of randomness in but it had done 90% of the job.