XML Copy Editor is a fast validating XML editor.

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