Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
Dragon Responsive Email Designer - Dragon Email Designer provides an intuitive drag and drop newsletter design tool.
GIMP - GIMP is a multiplatform photo manipulation tool.
Marble Responsive Email Designer - Marble helps you design beautiful and mobile-friendly emails and newsletters.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Kingmailer - Kingmailer helps you send, receive and route/forward emails.
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.