Link: http://www.xmlmind.com/xmleditor/
Source Author or Organization: Pixware

XMLmind XML Editor allows to edit large, complex, modular, XML documents. It makes it easy mastering XML vocabularies such as DocBook or DITA. XMLmind XML Editor is available in two editions: Personal Edition and Professional Edition. Personal Edition is free of charge, is restricted to non-commercial use and has fewer features than Professional Edition.