Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
Snip&Sketch - Quickly annotate screenshots, photos and other images with your pen, touch, or mouse and save, paste or share with other apps.
GIMP - GIMP is a multiplatform photo manipulation tool.
NinjaCapture - All in on Screen Capture
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Picosmos Tools - Picosmos Tools integrates picture browsing, editing, layout, frames, and cosmetic effects into one set. It also provides plenty of source material.
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.