(Draw a process state chart with SketchUML, the title and menu bar is not recorded.)
SketchUML is a pen-based interaction UML (Unified Modeling Language) diagram editor, which converts the shapes user drawn into software UML objects.
To use SketchUML, the user first imagine the shape of a figure and draw it on the software. The software then recognizes the stroke and provides a list of objects the user likely means. The user selects the object he/she truly means from the list. SketchUML convert the stroke into software object according to the selection, and the user could edit on the properties of the object.