Most popular apps
GIMP is a free program for such photo retouching, image composition and image authoring. Essentially it's the closest thing to Photoshop you can get for free.
Krita is a professional Free and open source (FOSS) painting program. It is made by artists that want to see affordable art tools for everyone within concept art, texture and matte painters, illustrations and comics.
Adobe Photoshop is a raster graphics editor developed and published by Adobe Inc. for Windows and macOS. It was originally created in 1988 by Thomas and John Knoll.
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.
Greenshot is a light-weight screenshot tool optimized for productivity with Optical Character Recognition (OCR) support.
Online photo editor, which can work with PSD, XCF and Sketch files (Photoshop, Gimp and Sketch App). Convert between PSD, XCF, JPG, PNG and many other formats.
Features a free draw tool, arrows, lines, circles, and other tools for editing screenshots you take. Possibility to add text, but not possible to change text size.
Affinity Designer is the fastest, smoothest, most precise vector graphic design software available. Built from the ground up over a five-year period, every feature, tool, panel and function has been developed with the needs of creative professionals at its core.
The vector graphics design software that allows you to create sophisticated graphics, amazing layouts and illustrations - all in just one super powerful tool.