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.
Talent Pool by Minty - Reach award-winning illustrators for your projects
Artrage - A simple but lovely natural media painting and sketching program.
VPaint - Experimental vector graphics editor.
Procreate - Procreate is the most powerful and intuitive digital illustration App available for iPad®.
Clip Studio Paint - The artist's software for drawing and painting.