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 :


 * DTD/XML Schema/RELAX NG validation
 * XSLT
 * XPath
 * Pretty-printing
 * Syntax highlighting
 * Folding
 * 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)

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.

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

Sample implementations
(links to demo sites running the tool or successful implementations of it)

Current version number and date of release
1.0.9.7 (2007-07-12)

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

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