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]
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].
Java Swing-based XML editor that analyzes a given XML schema and then generates a document-specific graphical user interface. Generic XML configuration tool. Generic schema-driven data-entry form. [Open source]