eXist is an Open Source database management system that was built using the XML technology. For instructions on how to install and start eXist, please refer to exist-db.org/quickstart.html. Alternatively you may directly start the database with the included Jetty webserver and read the documentation which will be available at
localhost:8080/exist/

eXist can be installed on newer versions of Linux, Windows and Mac OS X.

To start eXist on Windows, double click on the created desktop icon ("eXist Database Startup") or the corresponding entry in the start menu.

On other operating systems, change into the location where you installed eXist and call
bin/startup.sh or bin/startup.bat

If these scripts don't work for you, try to call Java manually:
java -jar start.jar jetty

Requirements:
* Java

The license of this software is Free, you can free download and free use this database management software.