Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
GoldenHour.One - Your personal assistant for outdoor photography for iOS
GIMP - GIMP is a multiplatform photo manipulation tool.
Retinize It - Photoshop actions for preparing designs for iOS or optimize
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
CSS Hat - Turn layers from Photoshop CC 2014 to code instantly.
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.