A web based address book

 Turba is the Horde contact management application. Leveraging the Horde
 framework to provide seamless integration with IMP and other Horde
 applications, it supports storing contacts in SQL, LDAP, Kolab, and IMSP
 address books.
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 This package is part of Horde, a web application Framework written in PHP with
 modules like IMP (webmail), Turba (contacts), Kronolith (calendar), Nag (task
 list), Gollem (file manager), etc.