Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
PhotoMix - Affordable photography in the Gatineau/Ottawa region!
GIMP - GIMP is a multiplatform photo manipulation tool.
Collagerator - Create amazing photo collages in few mouse clicks. Ready for download for Mac OS X and Windows.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
TurboCollage - TurboCollage - photo collage editor software. Make collages, picture piles, picture grids, montages, and mosaics on your Mac or Windows PC. Download a free trial now!
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.