Schema Editor - XSLT Editor - XSLT Debugger - XSL-FO Editor - XQuery Editor
EditiX is a powerful and easy to use DTD editor for Windows, Linux and Mac OS X designed to help web authors and application programmers take advantage of the latest XML and XML-related technologies.
"This is really a great app for creating and developing XML-based documents"
Rüdiger Weiß-Mazzoni
"useful and professional XML editor"
Eyal Katz