Pigment by ShapeFactory - A unique way to explore color using lighting and pigment
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.
ColorMe - Visualize The CSS Color Function
Autodesk SketchBook - SketchBook drawing and painting software provides designers, architects, and concept artists the tools to sketch ideas quickly and create beautiful illustrations.
ibis Paint X - Drawn with + ibisPaint
Clip Studio Paint - The artist's software for drawing and painting.