JET Code Generator
- Java database access code generator based on XML and XSLT. It contains a example complete with Ant build scripts.
- http://jmatrix.net/content/jetgen_home.jsp

DataDirect XQuery
- 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.
- http://www.datadirect.com/products/xquery/

eXist
- A native XML database featuring index-based XPath query processing, extensions for keyword search and XUpdate support. [Open Source, LGPL]
- http://www.exist-db.org/

XchainJ
- 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. [S
- http://xchainj.com/

X-Hive/DB
- XML Database in form of a Java-based persistent DOM implementation. [Commercial]
- http://www.x-hive.com/

Infonyte GmbH
- 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]
- http://www.infonyte.com/en/index.html

JSX
- 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 commerc
- http://www.csse.monash.edu.au/~bren/JSX/

DB2XML
- Converts database data into XML format. [Open Source, GPL]
- http://www.informatik.fh-wiesbaden.de/~turau/DB2XML/index.html

XML-DBMS
- Java packages for transferring data between XML documents and relational databases. [Open Source, Public Domain]
- http://www.rpbourret.com/xmldbms/index.htm