Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
PanoramaCrop for Instagram - PanoramaCrop for Instagram is a free photography app that allows you to easily splits your wide photos so you can make the most out of the new Instagram’s multi-photo images, created and published by Muffin.
GIMP - GIMP is a multiplatform photo manipulation tool.
King Camera - Cam 360 Selfie Camera, King Camera is one of best, a professional selfie camera app that takes beautiful selfies in seconds with effects filters.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Cool Gram - $5 a month makes your IG officially cool.
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.