GIMP (GNU Image Manipulation Program) is a free and open-source raster graphics editor, available for all major platforms: Linux, Mac OS X, and Windows.
GIMP can be used for image retouch and editing, resizing, cropping, layer management, color management, free-form drawing, and we can also add extra abilities with extensions, such as the Animation Package and Paint Studio.
Today we will show you, how you can easily remove acne and other blemishes with Gimp
Open picture in Gimp
Double click on Healing tool on your Toolbox, tool options panel appears
You can choose size of Healing tool and other preferences
Now go to blemish you want to repair, press Ctrl key and left click on surroundings of the blemish to choose corrector.
Release Ctrl key and left click on the spot you want to correct
That’s it, spot disappear. You can repeat this approach if necessary, you can also select different surroundings to balance corrected place.
Full video tutorial you can find here: