Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
Zerene Stacker - Zerene Stacker is “focus stacking” software designed specifically for challenging macro subjects and discerning photographers. Of course it works great with simpler subjects, close-ups, and landscapes also!
GIMP - GIMP is a multiplatform photo manipulation tool.
Helicon Focus - Focus stacking software: a post-processing technique that extends the depth of field in your photographs.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Enblend/Enfuse - Enblend combines images that overlap into a single large image with no seams.
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.