Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
Priime - Edit photos with the styles of the world's top photographers. Smart suggestions, fast editing, and inspiring collections.
GIMP - GIMP is a multiplatform photo manipulation tool.
Filters for iPhone - Transform your photos. 800+ filters and effects. Just 99¢.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Dubble - Take a picture and randomly mix it with anyone in the world
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.