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.
CSSGram - Recreate Instagram filters with CSS filters and blend mode
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
CSSCO - VSCO Filters with CSS
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.
Clips by Fly Labs - The simplest mobile video editor in the world