Procreate - Procreate is the most powerful and intuitive digital illustration App available for iPad®.
miniPaint - Online graphics editing tool use HTML5 technologies like Canvas, Offline support, Drag and Drop.
ibis Paint X - Drawn with + ibisPaint
RealWorld Paint - RealWorld Paint is an free portable image/photo/animation editor.
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.
Paint XP for Windows 7 - Standalone old MS Paint program that allows you to get your old XP Paint interface in Windows 7.