Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
FutureLearn - Free online courses from top universities and cultural institutions
GIMP - GIMP is a multiplatform photo manipulation tool.
StraighterLine - StraighterLine is an online educational platform that provides a huge amount of courses on various topics fully enriched with knowledge.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
VTC - Enhance your software, business and creative skills with more than 1000 online course titles with certifications, exclusive training by VTC
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.