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.
IconStore - Free icon packs by first-class designers
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Feather Icons - Simply beautiful open source icons
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.
Streamline icons - The world’s largest icon pack library - 100k icons and illustrations.