XMLSer(ializer) is a library to encode Java objects into XML. Currently at a very basic stage, it should still handle most objects properly. Some customization of XML, such as aliasing, is supported. All special handling is done via annotations.
FFJUXS Free Java Universal XML Serializer: The aim of this project is to create a serializer that supports anything the standard Java Serializion supports (not just JavaBeans) - and more - using the XML file format and giving many options.
Atabaque DTDtoBean generates JavaBeans from a specified DTD file. You can choose generate standard Java Beans or using Annotations for XStream or Simple, APIs for XML Serialization. It´s available as a command line, Swing application or NetBeans plugin.
Gulfstream is a Java XML serialization/deserialization framework capable of read and write Java primitive types, arrays, collections, JavaBeans and classes marked with special annotations.