TwistedBrush Pro Studio - A powerful and unique natural media painting program.
Sketch - Professional digital design for Mac.
Corel Painter - Corel Painter is media painting software.
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
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.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.