Resynthesizer is Gimpīs Heal.
Get the latest Gimp 2.8 build from parthas place. It has been fixed of bugs. -> http://www.partha.com/
Also download the additional plugin installer from there, install it after Gimp installation.
Now itīs very easy because You donīt need to install Python separately on Windows, like in previous versions of Gimp.
Meaning You can easily install other useful python plugins too from gimp registry, like layer effects.
From menu Filters->Enhance->Heal Selection.
Selected area will be filled by pixels taken from outside selection. This post has been edited by Graven on Tuesday, May 29 2012, 14:05