Photo and Image Editing Software for Windows
My go-to app is GIMP – GNU Image Manipulation Program. It has functions similar to those found in Adobe® products and other high-end image editing software. As such, GIMP has a very steep learning curve.
This is the description on the web site:
The Free & Open Source Image Editor
GIMP is a cross-platform image editor available for GNU/Linux, OS X, Windows and more operating systems. It is free software, you can change its source code and distribute your changes.