The Horde calendar application

Kronolith is the Horde calendar application. It provides a stable and
featureful individual calendar system for every Horde user, and
collaboration/scheduling features are starting to take shape. It makes
extensive use of the Horde Framework to provide integration with other
applications. For more information (including help with Kronolith)
please visit http://www.horde.org/.

WWW: http://www.horde.org