An embeddable software product based on the XQuery and XQJ standards that enables Java developers to access both relational and XML data sources using a single XQuery query.

Converts database data into XML format. [Open Source, GPL]

A native XML database featuring index-based XPath query processing, extensions for keyword search and XUpdate support. [Open Source, LGPL]

The Infonyte product suite stores, queries, and processes native XML without bothering about limited main memory and processing capabilites. It is W3C DOM compliant and requires only a Java Virtual Machine. [Commercial]

A framework for generating and developing database applications through XML files.

Java database access code generator based on XML and XSLT. It contains a example complete with Ant build scripts.

Serializes Java objects to and from XML, with no class modifications needed - works automatically for all objects. It reverse engineers the Java standard for serialization, and uses it when needed. requires JDK1.2 or higher. [JSX1 is GPL; JSX2 is commercial]

Provides integration of XML with relational databases, automating the storing of XML documents in a database and the mapping of XML directly to rows and columns. [Commercial]

XML Database in form of a Java-based persistent DOM implementation. [Commercial]

Provides XML/database interoperability without the need to write XML-specific or database-specific software. It provides full support for XML Schema and DTDs and eliminates most of the complexity associated with XML Schema. By Cogent Logic Corporation. [Shareware]

Java packages for transferring data between XML documents and relational databases. [Open Source, Public Domain]