VMTools
- A collection of XML-oriented tools for the java platform. Current release of the toolkit contains tools for automatically generating differences between two XML documents.
- http://www.vmsystems.net/vmtools/

MajiX
- Converts Word files to XML. [Open Source, MPL]
- http://sourceforge.net/projects/majix

Koala Bean Markup Language
- Using standard JavaBeans introspection, this package enables "interface-level" serialization and deserialization of JavaBeans, as opposed to the "implementation-level" approach of the core Java Serialization API. [Open Source, BSD-like
- http://koala.ilog.fr/kbml/