MS XML Notepad 2007 <BR><BR>edit: just to clarify, this is an xml file editor that has a tree view pane on the left. You can right click and expand the whole tree, or leave it collapsed.

New features of oXygen 2.0 include the ability to view and edit a XML document as a graphical tree; spell checking; enhanced support for XML Catalogues; the ability to configure external tools to ...