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.
Material Maker - Cross-platform, procedural texture generation tool.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Substance Designer - Substance Designer is a node-based non-destructive application for material authoring.
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.
Filter Forge - On the surface, Filter Forge is just a Photoshop plugin, a pack of filters that generate textures...