Commercial
DocFlex/Javadoc 1.6.0
DocFlex/Javadoc is both a multi-format Javadoc Doclet and a tool for development of Javadoc-based high-quality Java API documentation generators in various output formats, which by their quality and complexity are equal or exceed the standard Javadoc
Trial
DocFlex/XSD II 2.8.0
A toolkit to generate high quality XML schema documentation in HTML, RTF and TXT (plain text) formats with a possibility of automatic inserting of XSD diagrams generated by XMLSpy or Oxygen XML (with the full support of diagram hyperlinks)
Trial
FlexDoc/XML XSDDoc 2.9
High-performance XML Schema Documentation Generator with diagrams. Generates by any number of input XSD files a highly-navigable Javadoc-like HTML as well as single-file HTML/RTF. Diagrams generated by own diagramming engine look as those of XMLSpy.