Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
imgix - Real-time Image Processing. Resize, crop, and process images on the fly, simply by changing their URLs.
GIMP - GIMP is a multiplatform photo manipulation tool.
Cloudimage - Cloudimage.io is the easiest way to resize, store, and deliver your images to your customers through a rocket fast CDN.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Sirv - Dynamic image processing, hosting and rich-media for retailers and eCommerce.
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.