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.
wisaw - What I Saw Today (cool things) -- Minimalistic Anonymous Photo Sharing
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Szoter - Szoter is easy to use, free, online image annotation tool. Annotate, draw and highlight any image.
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.
WallaMe - Hide messages in the real world using augmented reality