XML Copy Editor

Synopsis
"XML Copy Editor is a fast, free, validating XML editor."

Features
From http://xml-copy-editor.sourceforge.net/index.php?page=features :

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 * DTD/XML Schema/RELAX NG validation
 * XSLT
 * XPath
 * Pretty-printing
 * Syntax highlighting
 * Folding== User commentary ==
 * Tag completion
 * Tag locking
 * Tag-free editing
 * Spelling and style check
 * Built-in support for XHTML, XSL, DocBook and TEI
 * Lossless import and export of Microsoft Word documents (Windows only)

User commentary
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System requirements
Available for Windows and Linux.

Source code and licensing
Open-source (GNU General Public License)

Support for TEI
DTD/Schema for P4/5 are included.

Language(s)
Interface in English.

Documentation
See Online Help.

User community
https://sourceforge.net/forum/forum.php?forum_id=475215

Current version number and date of release
1.1.0.3 (2007-10-15)

History of versions
http://sourceforge.net/news/?group_id=141776

How to download
See http://xml-copy-editor.sourceforge.net/.