Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
Darktable - darktable is an open source photography workflow application and raw developer.
GIMP - GIMP is a multiplatform photo manipulation tool.
Krita - Krita is a professional FREE and open source painting program. It is made by artists that want to seaffordable art tools for everyone. Concept art. texture and matte painters, illustrations and comics.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Canva - Canva is a graphic-design platform with a drag-and-drop interface to create print or visual content while providing templates, images, and fonts. Canva makes graphic design more straightforward and accessible regardless of skill level.
PhotoPad Photo Editor - A large portion of the altering a normal client does on computerized photographs incorporates shading and light changes, resizing, editing and other little undertakings.