Atidan Document Explorer for SharePoint is a tree-view control that displays your Microsoft® SharePoint site’s document library structure and content in the familiar explorer type view.
Document libraries and associated contents are presented in an intuitive, collapsible, hierarchical format.
The is a great control, but the problem is it displays all document libraries under site. Because it is using User Control and no property to set. So I decide to extend the web part which allow user specify the document library.
You can download the source from here.