Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
Wallhaven - Your source for the best high quality wallpapers on the Net!
GIMP - GIMP is a multiplatform photo manipulation tool.
InterfaceLIFT - High-resolution widescreen wallpapers, desktop icons, and themes for Mac OS X, Microsoft Windows...
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
WallpaperFusion - The best multi-monitor and Eyefinity wallpaper images, all in one place!
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.