XML Pro - Java-based XML editor that supports DTD validation. [Commercial] NetBeans XML Project - XML editor plugin for Netbeans, the open source Java IDE. Supports both text mode and tree mode editing. [Open Source] EditiX - Cross-platform and multi-purpose XML editor, XSLT debugger and Visual Schema Editor. Provides editing support for XML, DTD, XHTML, XSLT, XSD, XML RelaxNG, SVG, MathML and XSL FO [Commercial, 30-day trial]. XMLmind XML Editor - Very good editor for structured documents (like DocBook XML). DTD-only version is free to use and comes with DocBook support. XML Schema enabled version is commercial available. Xeena - Generic Java application for editing valid XML documents derived from any valid DTD. (IBM Corporation) xmloperator - An XML editor for data oriented documents. Editing is guided by any DTD or RELAX NG schema. [Open Source, BSD-like] GenDoc - A XML editor written in Java2 that can be specialize for a set of DTD. It is based on a existing project MerlotXML. [Open source] Xerlin - An extensible Java based XML editor. [Open source] Pollo - Tree-mode and text-mode XML editor with color-coding. Can read DTDs and many types of schemas to enhance editing. Built-in support for Cocoon sitemap files, Ant build files and XML Schemas. [Open Source, BSD-like] Jaxe - A graphical Java XML editor customizable with an XML schema and a file describing the menus to insert the elements. [Open source, GPL] Exchanger XML Editor - A Java-based XML editor that facilitates easy browsing, editing, managing and conversion of XML documents. By Cladonia Ltd. [Commercial] Stylus Studio - Java and XML Tools - Tools for building XML-enabled Java/J2EE applications, including a JSP 1.0/2.0 editor, Java IDE, support for Java XML components including Xalan, Xerces, Saxon, and Java Web services. [Commercial]