1)   XMLwriter XML Editor 2.6
XMLwriter is a powerful XML editor for Windows designed to help web authors and web application programmers take advantage of the latest XML and XML-related technologies such as XSLT and XSD Schemas.

 2)   Bonodi XML Editor 2.12
Bonodi XML Editor is a multilingual XML editor for MS Windows 98/Me/NT4/2000/XP. You can edit XML documents in English, Japanese, Chinese, Korean, Russian, Greek, Thai, Hebrew, Arabic, and other languages on any language version of MS Windows.

 3)   VorteXML 3.0
VorteXML quickly and easily transforms existing structured text data output such as reports, invoices, log files and HTML generated from any computer system into valid XML using any DTD or Schema.