A free GIMP 2.10 plugin that combines a slightly faded look with gradients of color to enhance photo images.
Download the file then copy it to one of the following hidden locations. If you have not already done do, it is much easier to find these folders if you make them visible — in Windows, you can do this from the menu bar in File Explorer.
Windows:
C:\user\<username>\AppData\Roaming\GIMP\2.10\plugins
Linux:
/usr/<username>/.config/GIMP/2.10/plugins
And that's all there is to it. Open GIMP and you're now ready to go with your new plugin.