http://www.castor.org/

Short feature list (we haven't got all day):
- Castor XML: Java object model to and from XML (XML databinding)
- Generate source code from an XML Schema
- Default introspection or mapping file for existing object models
- Castor JDO: Java object persistence to RDBMS
Castor JDO is not the same-as or compatible with Sun's JDO. We have a different approach to handling data object to RDBMS mappings. Please see the JDO FAQ for more information.

- XML-based mapping file to specify bindings for existing object models
- Support for schema-less Java to XML binding
- In memory caching and write-at-commit reduces JDBC operations
- Two phase commit transactions, object rollback and deadlock detection
- OQL query mapping to SQL queries
- EJB container managed persistence provider for OpenEJB
- Ability to create base mapping from existing Java classes
- Ability to create an XML Schema from an XML input document
See the status page for more information.