Resynthesizer

Plugin for Gimp Removes Objects From Pictures

Screenshots

Hunter's comment

Resynthesizer is a plugin for GIMP (GNU Image Manipulation Program) a free open source image editor for Windows, Linux and Mac. The plugin allows you to easily remove objects from your pictures and replaces those objects with pixels from around it to make it look like they were never there. Take a look at the before and after images below to see where I removed the seagull poop from the railings in the picture.
Before Picture
After Picture

This tool allows you to quickly erase objects in your images with minimal input – even when the background is complex.
Source - Davies Media Design

Link

https://github.com/bootchk/resynthesizer