Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.
GIMP - GIMP is a multiplatform photo manipulation tool.
Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Wondershare PDFelement - All-in-one PDF editor
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.