The DSI utilities are a mishmash of classes accumulated during the last twenty years in projects developed at the DSI (Dipartimento di Scienze dell'Informazione, e.g., Information Sciences Department), now DI (Dipartimento di Informatica, i.e., Informatics Department), of the Università degli Studi di Milano. You can have a look at the Javadoc overview to have an idea of what's in.

The DSI utilities are free software distributed under either the GNU Lesser General Public License 2.1+ or the Apache Software License 2.0.