Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
Wolf3D - Virtual humans for virtual worlds.
GIMP - GIMP is a multiplatform photo manipulation tool.
Peeps: 3D Avatar Maker - Peeps is an interactive 3D avatar maker.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Boring Avatars - JavaScript library to generates SVG avatars based on text.
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.