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. Right now, Kronolith implements a solid, stand-alone calendar system, allowing repeating events, all-day events, custom fields, keywords, and managing multiple users through Horde Authentication. The calendar API that Kronolith uses is abstracted such that it could work with any backend, but right now we provide SQL (abstracted to support most databases, including MySQL, PostgreSQL, Oracle, and MSSQL via PEAR DB) and MCAL backend libraries. The latest (not yet released) version, available from CVS supports shared calendars, allowing others various levels of access to your calendar, better iCalendar support, and generation of iCalendar free/busy information.