Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
GIMP - GIMP is a multiplatform photo manipulation tool.
placeholder.pics - Lightest way to include placeholder images in your design
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
PlaceKitten - Dead-easy placeholder images. Of kittens.
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.
Fill Murray - Custom-sized placeholder images of Bill Murray