Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
GIMP - GIMP is a multiplatform photo manipulation tool.
Anchor CMS - Free and lightweight blogging system
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Textpattern - Textpattern is an elegant content management system that is free, open source software.
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.