This site works pretty well at removing objects from a picture. It works best when the object is pretty small in relation to the picture. To test, I uploaded this picture:
I think higlighted the person in the purple to the right of the picture with the website and it removed them.
Your mileage may vary. When I attempted to remove the person in orange on the log I was left with a mess of a person on the log.
Helpful tip when using the site. It will start the removal process as soon as you lift your finger from your mouse button, so be sure to leave your finger on the button until you’ve highlighted the entire object you want to remove.