eXist-db is an open source database management system built using XML technology. It stores XML data according to the XML data model and features efficient, index-based XQuery processing.
RefDB is a reference database and bibliography tool for SGML, XML, and LaTeX/BibTeX documents. It allows users to share databases over a network. It is accessible through command-line tools, through a web interface, from text editors (Emacs, Vim), and it contains a SRU server. Programmers can use Perl and PHP libraries to integrate RefDB functionality into their own projects. RefDB is released under the GNU General Public License and runs on Linux, the *BSDs, OS X, Solaris, and Windows/Cygwin.
Model-based Data Export Tool
Features
* Mass data export to XML and SQL.
* Generates hierarchically structured XML and topologically sorted SQL-DML.
* Exports consistent and referentially intact row-sets from your productive database and imports the data into your development and test environment.
* Removes and archives obsolete data from your productive database without violating integrity.
* Open Source. Entirely written in Java. Platform independent. DBMS agnostic.
XML to DDL is a set of python programs to convert an XML representation of a schema into a database and vice versa. It can also examine the differences between two databases and emit the ALTER DDL statements required to bring the database up-to-date. This