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.
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.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
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.
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.
Cool Gram - $5 a month makes your IG officially cool.