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Library for working with recurrence rules for calendar dates.rrule.js supports recurrence rules as defined in the iCalendar RFC, with a few important differences. It is a partial port of the rrule module from the excellent python-dateutil library. On top of that, it supports parsing and serialization of recurrence rules from and to natural language.
Recurr is a PHP library for working with recurrence rules (RRULE) and converting them in to DateTime objects. Recurr was developed as a precursor for a calendar with recurring events, and is heavily inspired by rrule.js.
iCalendar is a standard (RFC 2445) for calendar data exchange. The standard is sometimes referred to as "iCal", which also is the name of the Apple, Inc. calendar program (see iCal) that provides one of the implementations of the standard. iCalendar allows users to send meeti...
DDay.iCal is an iCal (RFC 5545) class library for .NET 2.0 and above, Silverlight. It aims at being as RFC 5545 compliant as possible, while targeting compatibility with popular calendaring applications, like Apple iCal, Outlook 2007, etc.
GCALDaemon is a Java program that offers two-way synchronization between Google Calendar and various iCalendar (RFC 2445) compatible calendar applications (Sunbird, Rainlendar, Apple iCal, Lightning, Evolution, KDE Kontact, Vista Calendar, etc).
ice_cube is a ruby library for easily handling repeated events (schedules). The API is modeled after iCalendar events, in a pleasant Ruby syntax. The power lies in the ability to specify multiple rules, and have ice_cube quickly figure out whether the schedule falls on a certain date (.occurs_on?), or what times it occurs at (.occurrences, .first, .all_occurrences). To limit schedules use count or until on the recurrence rules. Setting end_time on the schedule just sets the duration (from the start time) for each occurrence.
Gregorian calendar date recurrance as described by RRULE in rfc2445. This is an open source java implementation of that rule. When the rule is used, you can ask for all matching dates or given a date find the next/previous occurance.
iCal4j is a Java library used to read and write iCalendar data streams as defined in RFC2445. The iCalendar standard provides a common data format used to store information about calendar-specific data such as events, appointments, to-do lists, etc. All of the popular calendaring tools, such as Lotus Notes, Outlook and Apple's iCal also support the iCalendar standard.For a concise description of the goals and directions of iCal4j please take a look at the open issues.
palm2ical is a Java program that converts Palm databases as stored on Windows into ical/ics files per RFC 2445, and specifically for the Apple iCal product. Note that this is a one-way conversion; there is no support for synchronizing Palm databases.
RemoteCalendars is a COM-.NET Add-in for Outlook 2003/2007, written in C#. After installing this plugin, every Outlook user should be able to subscribe, reload and delete a generic remote iCalendar (RFC 2445) from Outlook 2003/2007.