H2 is a relational database management system written in Java. The software is available as open source software under modified versions of the Mozilla Public License or the original Eclipse Public License. The modification of the MPL is a shorter file header and the license name.
You can start the database simply with the following command:
java -jar h2-1.3.159.jar
For further information have a close look on the H2 homepage: H2 Databse Engine
