Altova XMLSpy XML Editor
   Popular XML Editor and IDE including XML Schema designer, code generator, file converters, debuggers, profilers, support for XSLT, XQuery, WSDL, SOAP, plus .NET and Eclipse integration. [Commercial, 30-day trial]
   http://www.altova.com/products/xmlspy/xml_editor.html

Antenna House XML Editor 3.2
   The Antenna House XML Editor 3.2 is a software application that combines two tools. One is for editing XML documents. The other is a parsing application, which verifies if an XML document and DTD is correct by comparing it with the XML specification. It s
   http://www.antennahouse.com/product/XMLEditor/spec.htm

EditiX
   XML editor and XSLT debugger for Windows, Linux and Mac OS X. Provides editing support for XML, DTD, XHTML, XSLT, XSD, XML RelaxNG, SVG, MathML and XML FO.
   http://www.editix.com

Stylus Studio
   Sonic Software's platform for an XML development environment that includes an XML Schema editor, XSLT editor, XML-XML mapper, debugging and document wizards. [Commercial]
   http://www.stylusstudio.com

Syntext Serna XML WYSIWYG Editor
   Syntext Serna is a customizable, multi-platform, XSL-driven WYSIWYG XML content editor. It looks and works like a conventional word processor, and supports Docbook, DITA, and TEI.
   http://www.syntext.com/products/serna/index.htm

Tagfree2000
   Contains XML, DTD, and SMIL editors. [Commercial]
   http://www.tagfree.com

XML Marker
   Offers a tree-table-text interface eith both hierarchical and tabular style views.
   http://symbolclick.com

XML:Wrench
   Windows editor and tools for XML and other file formats. Includes tools for validation, importing from HTML, and transforming using XSL(T).
   http://www.xmlwrench.com/

XMLWriter
   A validating XML text editor for Windows that supports XML, XSL, DTD, CSS, and HTML files. [Shareware]
   http://xmlwriter.net/

XMLmind XML Editor
   XXE, for short, is a full-fledged XML 1.0 editor featuring a word processor-like view (CSS2 styled). It has been created to make technical persons comfortable and productive at editing XML documents and XML data. [Open Source]
   http://www.xmlmind.com/xmleditor

XMetaL
   A document-centric authoring tool for XML and SGML. [Commercial]
   http://na.justsystems.com/content.php?page=xmetal

XmlTool
   Mouse-based editor for XML files, that generates HTML, XSL, DTD files, and gets Database structure and queries. [Shareware]
   http://www.xml.com/pub/p/17

epcEdit
   Validating XML/SGML document editor for Windows, Linux, and Solaris. [Commercial]
   http://www.epcedit.com/