Carefully and effectively cleans out impulse noise of any kind from the dark areas of the image. I had a problem finding a good plug-in which would be able to clean out these huge and ugly hot dots that my "carry-me-everywhere" Nikon S6300 camera produces on very high ISO's. I've found nothing reasonably good, so I decided to write it myself.
Impulse noise eliminated
Written in Python. Download, rename (remove the .txt extension), put it to ~/.gimp-[version]/plug-ins and make it executable (chmod 755). Run from Filters/Enhance/Hot Pixel Removal...