Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
A.I. Gigapixel - AI based image resizer
GIMP - GIMP is a multiplatform photo manipulation tool.
Photozoom Pro - BenVista PhotoZoom Pro 7 creates perfect image enlargements and increases photo resolution at high quality using our patented S-Spline Max interpolation algorithm
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
waifu2x - Online/Offline tool to upscale images
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.