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.
FontForge - Free (libre) font editor for Windows, Mac OS X and GNU+Linux
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
FontLab VI - font creation and editing, including variable fonts and color fonts
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.
Glyphs - Make everything from dingbat webfonts to full-fledged text typefaces in the most Mac-like font...