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.
PaintBerri - PaintBerri is a free art site that offers an awesome oekaki community.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Brush Ninja - Hand-drawn Animated Gif Creator
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.
okekai - A small community site where you can draw, animate, and chat through pictures all for free