Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
Any To GIF - Convert any picture into an animated GIF file.
GIMP - GIMP is a multiplatform photo manipulation tool.
MotionGIF - An all-in-one, easy and feature-rich GIF animator for Web animation!
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
PicGIF - PicGIF for Mac is an intuitive and agile GIF maker that allows you to create animated GIFs from photos/videos on Mac OS X in a few seconds.
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.