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.
Limbo - “Dark, disturbing, yet eerily beautiful, Limbo is a world that deserves to be explored.” Joystiq. “Limbo is as close to perfect at what it does as a game can get.” Destructoid. Buy LIMBO: Special Edition.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Feist - Feist performs 'Century' featuring Stephen Colbert. Leonard Cohen Tribute at the Juno Awards. Pleasure Tour. The Making of Pleasure. x.
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.
World of Goo - get it here | read the blog | forum.