Turba is the Horde contact management application. It is a production level address book, and makes heavy use of the Horde framework to provide integration with IMP and other Horde applications. It supports SQL, LDAP, Kolab, and IMSP address books.

Turba literally means crowd in Latin. It may refer more specifically to any text in the biblical Passion of Jesus which is spoken by any group of people, including the disciples, the Jews, or the soldiers. In musical settings it has been broadened to refer to any direct address in the Passion, except the words of Jesus.