Paint.net is a free and very capable image editing software for Windows. Great alternative to Photoshop for people that do not need all the stuff PS offers.
Pixelmator is a image editing application for macOS and iOS.
PictureMan PRO
3
3
Very powerfull image processing, editing, and retouching.
Very powerfull image processing, editing, and retouching.
PictureMan PRO Platforms
Windows
PictureMan PRO Video and Screenshots
PictureMan PRO Overview
Very powerfull image processing, editing, and retouching. Fully supported 48 bit color mode (in layers and all filters), automatic enhancement (Red Eye removal, Scratch and Dust removal, and more with one click), over 130 image processing tools, measure module, scripting and automation. Adobe Photoshop plug-ins are supported. Not very eye candy, but ergonomic graphical user interface.