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
MediBang Paint - The official site for MediBang Paint, the free digital painting and manga creation software. You can download the latest version of MediBang Paint here, and get news and tutorials.
ColorMe - Visualize The CSS Color Function
Artrage - A simple but lovely natural media painting and sketching program.
Flamingo Animator - Flamingo Animator is the perfect app for anyone who wants to create their own animated cartoons.