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.
Color Hunt - Curated collection of beautiful colors, updated daily
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Material Palette - Generate and export your Material Design color palette
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.
Coolors.co - The super fast color schemes generator! Create, save and share perfect palettes in seconds!