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.
Charts Factory - Create simple charts super fast and for free!
Artrage - A simple but lovely natural media painting and sketching program.
Google Charts - Interactive charts for browsers and mobile devices.
Clip Studio Paint - The artist's software for drawing and painting.
ZingChart - ZingChart is a fast, modern, powerful JavaScript charting library for building animated, interactive charts and graphs. Bring on the big data!