Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
GIMP - GIMP is a multiplatform photo manipulation tool.
Help & Manual - Help & Manual is a documentation authoring tool that allows you to create a single source text and convert it into a number of other target formats.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Dr.Explain - Dr.Explain software is a help file authoring 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.
MadCap Flare - Documentation for Any Audience, Language or Format