iCalendariCalendar import and export. iCalendar is supported by Mozilla products, Apple iCal and even Microsoft Outlook.Support for freebusy time is limited, the rest should work.Currently used in production for an internal application andDabbleDBThe SeaCal package contains classes to publish a calendar over http.Based on work done by David Röthlisberger and Vera Fischer forSW2CalendarRFC 2445RFC 2446RFC 2447Wikipedia articlebroken clientsvCalendariCalendar is Version 2 of vCalendar, so it's supported too. Status is same as iCalendar.vCardimporting of versions 3.0 is 2.1 are supportedexporting of verion 3.0 is supportedRFC 2425RFC 2426Wikipedia ArticleChronosICalChronos providesChronossupport. Load ICal and Chronos first.MagritteICalMagritte contains Magritte descriptions for VCards, Todos and Events. This should simplify the creation of UIs.