Autodesk SketchBook Express is a digital drawing program based on its full-version counterpart, Autodesk SketchBook Pro. It is a professional-grade paint and drawing application designed for Windows, iOS, Mac OS X and Android devices. SketchBook Express offers a dedicated set of sketching tools and delivers them through an intuitive user interface. It is available as a free download with the purchase of a Wacom Intuos4 or Bamboo 3rd generation tablet.