Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
Rentman - Cloud rental management software for the AV & Event industry
GIMP - GIMP is a multiplatform photo manipulation tool.
projectM - projectM is an LGPL'ed reimplementation of Milkdrop under OpenGL.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Current RMS - RMS for AV, production, broadcast & event rental companies
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.