Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
potrace - Open source program that transforms bitmaps into vector graphics.
GIMP - GIMP is a multiplatform photo manipulation tool.
DragPotrace - A GUI for potrace using Objective-C for OS X 10.11
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Ras2Vec - Raster to vector conversion program for Windows 95/98/NT
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.