Freeware
XSL, getox, gnome-mlview, Microsoft XML NotePad, Peters XML Editor, SeleXML, XED, Xeddy for JBuilder, XML Cooktop, XML Notepad, XML Toybox
Schema and DTD
oXygen XML Editor, Popkin Software XML Architect, Simple Sample DTD/XML 1.0 Generator, Stylus Studio DTD Tools, TIBCO Extensibility TurboXML, XBuilder, xmlBlueprint, xmlDraft, XMLFox freeware XML/XSD Editor, XSBrowser
Altova XML Spy
A comprehensive product-line of software tools that consists of the XSLT Stylesheet Designer, the XML Spy Document Editor, and the XML Spy Integrated Development Environment, which includes an XML editor, XSLT editor, and graphical XML Schema designer. [Commercial]
EditML Pro
NetBryx Technologies' integrated development environment (IDE) tool; XML, DTD and Schema editor; also validation, XSLT transformation, browser preview and automatic DTD and XSL generation.
epcEdit
Validating XML/SGML document editor for Windows, Linux, and Solaris. [Commercial]
Stylus Studio
Sonic Software's platform for an XML development environment that includes an XML Schema editor, XSLT editor, XML-XML mapper, debugging and document wizards. [Commercial]
XMLmind XML Editor
XXE, for short, is a full-fledged XML 1.0 editor featuring a word processor-like view (CSS2 styled). It has been created to make technical persons comfortable and productive at editing XML documents and XML data. [Open Source]
XmlTool
Mouse-based editor for XML files, that generates HTML, XSL, DTD files, and gets Database structure and queries. [Shareware]
XMLWriter
A validating XML text editor for Windows that supports XML, XSL, DTD, CSS, and HTML files. [Shareware]