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.
OpenToonz - OpenToonz is an animation program that is a free software version of Toonz, the animation software...
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Synfig Studio - Just another WordPress site
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.
Adobe Animate - Adobe Animate is a Flash, vector animation software.