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.
Procreate - Procreate is the most powerful and intuitive digital illustration App available for iPad®.
TwistedBrush Pro Studio - A powerful and unique natural media painting program.
ibis Paint X - Drawn with + ibisPaint
Corel Painter - Corel Painter is media painting software.
Autodesk SketchBook - SketchBook drawing and painting software provides designers, architects, and concept artists the tools to sketch ideas quickly and create beautiful illustrations.