This is a Portlet widget, which is similar to a dijit.TitlePane, but is designed to be used with the dojox.layout.GridContainer widget. Each widget can be extended with a number of different plug in widgets, with each plug in specifying an icon to display in the title bar. (By the way, click this paragraph somewhere :-)
Two settings widgets are currently defined, dojox.widget.PortletSettings and dojox.widget.PortletDialogSettings
This Portlet is not draggable, but all others are.