Horde Application Framework

 The Horde Application Framework is a flexible, modular, general-purpose web
 application framework written in PHP. It provides an extensive array of
 components that are targeted at the common problems and tasks involved in
 developing modern web applications. It is the basis for a large number of
 production-level web applications, notably the Horde Groupware suites. For
 more information on Horde or the Horde Groupware suites, visit
 http://www.horde.org.
 .
 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.