Adobe Illustrator - Adobe Illustrator is a vector graphics editor.
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.
Affinity Designer - Professional creative software, exclusively for Mac.
Autodesk SketchBook - SketchBook drawing and painting software provides designers, architects, and concept artists the tools to sketch ideas quickly and create beautiful illustrations.
Adobe Illustrator CC - Adobe Illustrator CC is a commercial vector graphics editor.
Clip Studio Paint - The artist's software for drawing and painting.