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.
John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.
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.
Muzei - Muzei is a live wallpaper that gently refreshes your home screen each day with famous works of art.