agendav - A CalDAV web client similar to Google Calendar

•    PHP

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A CalDAV web client similar to Google Calendar

DavMail - POP/IMAP/SMTP/Caldav to Exchange

•    Java

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DavMail is a POP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway allowing users to use any mail/calendar client (e.g. Thunderbird with Lightning or Apple iCal) with an Exchange server, even from the internet or behind a firewall through Outlook Web Access. DavMail now includes an LDAP gateway to Exchange global address book and user personal contacts to allow recipient address completion in mail compose window and full calendar support with attendees free/busy display.

smtp-server mail-server gateway exchange-gateway pop3 imap ldap caldav carddav

Radicale - A simple CalDAV (calendar) and CardDAV (contact) server.

•    Python

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A simple CalDAV (calendar) and CardDAV (contact) server.

Radicale - A simple CalDAV (calendar) and CardDAV (contact) server.

•    Python

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Radicale is a free and open-source CalDAV and CardDAV server.

caldav cardav icalendar

org-caldav - Caldav sync for Emacs orgmode

•    Emacs

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Owncloud and Nextcloud: Regularly tested. Google Calendar: Should work, but you need to register an application with the Google Developer Console for OAuth2 authentication (see below).

EGroupware Enterprise Collaboration

•    Javascript

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EGroupware is a multi-user, web-based groupware suite. Currently available modules include: email, addressbook, calendar, infolog (notes, to-do's, phone calls), content management, wiki, project management, tracker, timesheet, knowledge base, CalDAV/CardDAV

taskcal

•    Java

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TaskCal Internet standards based human task management and process interaction. TaskCal is an iCalendar wrapper to the jBPM process manager, providing standards based calendar agent access to an actors tasks via email (iMIP), HTTP (.ics) and CalDav.

SOGo - Fast and scalable modern collaboration suite (groupware)

•    Objective-C

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SOGo is a very fast and scalable modern collaboration suite (groupware). It offers calendaring, address book management, and a full-featured Webmail client along with resource sharing and permission handling. It also makes use of documented standards (IMAP, CalDAV, CardDAV, etc.) and thereby provides native connectivity (without plugins) to many clients such as Microsoft Outlook, Apple iCal, the iPhone, Mozilla Lightning, and a plethora of mobile devices.

groupware collaboration collaboration-suite calendar mail webdav

Baikal - Baïkal is a Calendar+Contacts server

•    PHP

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This is the source repository for the Baïkal CalDAV and CardDAV server. Head to sabre.io/baikal for information about installation, upgrading and troubleshooting.

dav - sabre/dav is a CalDAV, CardDAV and WebDAV framework for PHP

•    PHP

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sabre/dav is the most popular WebDAV framework for PHP. Use it to create WebDAV, CalDAV and CardDAV servers. SabreDAV is being developed by fruux. Drop us a line for commercial services or enterprise support.

caldav webdav

libcaldav

•    C

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A client library adding support for the CalDAV protocol (rfc4791). The intension is to have a library which fully implements the protocol so that anybody with relative ease can add CalDAV support to there application.

Almanac Converter - A Java-based calendar converter

•    Java

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An easy-to-use Java-based calendar converter - able to convert between various known calendars.

date time date-time datetime-library calendar julian-calendar gregorian-calendar calendar-converter indian-calendar islamic-calendar hirji-calendar hebrew-calendar date-converter converter leap-year mayan-calendar

MBCalendarKit - An open source calendar framework for iOS, with support for customization, IBDesignable, Autolayout, and more

•    Objective-C

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MBCalendarKit is a calendar control written in Objective-C with modern best practices and Swift interoperability in mind. It offers a flexible calendar control, with support for displaying any calendar system supported by NSCalendar. It also includes an API to customize the calendar cells. It also ships with a prebuilt view controller, inspired by the original iOS calendar.

calendar calendar-view calendar-widget calendar-control ios uikit

simple_calendar - A wonderfully simple calendar gem for Rails

•    Ruby

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Simple Calendar is designed to do one thing really really well: render a calendar. It lets you render a calendar of any size. Maybe you want a day view, a 4 day agenda, a week view, a month view, or a 6 week calendar. You can do all of that with the new gem, just give it a range of dates to render.It doesn't depend on any ORM so you're free to use it with ActiveRecord, Mongoid, any other ORM, or pure Ruby objects.

calendar week-calendar custom-calendar meeting month

kalendaryo - An unopinionated React date component :atom_symbol: + :date:fns

•    Javascript

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Kalendaryo is an unopinionated React component for building calendars. It has no opinions about what your calendar component should look or function like but rather only helps you deal with those unique constraints by providing various variables your calendar component needs such as the calendar's state data and methods for getting(i.e. all the days in a month) and setting(i.e. selecting the date from a day) plus many more! See the Basic Usage section to see how you can build a basic calendar component with Kalendaryo, or see the Examples section to see more examples built with Kalendaryo. Is the state for the current date the component is in. By convention, this should only change when the calendar changes its current date, i.e. moving to and from a month or year on the calendar.

react-date react-kalendaryo react-date-component react calendar react-calendar kalendaryo unopinionated-react-date-component react-calendar-component

react-native-calendar-events - React Native Module for iOS and Android Calendar Events

•    Java

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A React Native module to help access and save events to iOS and Android calendars. This package assumes that you already have a React Native project or are familiar with React Native. If not, checkout the official documentation for more details about getting started with React Native.

android-calendar-events ios-calendar-events react-native calendar-events alarms calendar-api recurring-events ios-calendar-api android-calendar-api react-native-module andriod ios-library react-component ios android eventkit reminders

material-calendar-view - :calendar: Material Design Calendar compatible with API 11+

•    Java

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MaterialCalendarView is a prettier and simpler, material design calendar that allows full customization and it's backwards compatible with API 11+.

calendar android custom-view material-design material-calendar calendar-view

CalendarView - Android上一个优雅、万能自定义UI、支持周视图、自定义周起始、性能高效的日历控件，支持热插拔实现的UI定制！支持标记、自定义颜色、农历、自定义月视图各种显示模式等。Canvas绘制，速度快、占用内存低，你真的想不到日历居然还可以如此优雅！An elegant, highly customized and high-performance Calendar Widget on Android

•    Java

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Android上一个优雅、万能自定义UI、支持周视图、自定义周起始、性能高效的日历控件，支持热插拔实现的UI定制！支持标记、自定义颜色、农历、自定义月视图各种显示模式等。Canvas绘制，速度快、占用内存低，你真的想不到日历居然还可以如此优雅！An elegant, highly customized and high-performance Calendar Widget on Android.

calendarview calendar-component calendar-view calendar-widget calendar calendar-api android

Small Sharepoint Calendar

•    

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Ajax Enabled Small Sharepoint Calendar

ajax-calendar calendar calendar-webpart moss-2007 moss-2007-tools moss-calendar moss-webparts

Simple-Calendar - A simple calendar with events, customizable widget and no ads.

•    Kotlin

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A simple calendar with events and a customizable widget.An offline calendar without any other calendar integration. You can easily create recurring events and setup reminders, it can also display week numbers.

calendar android android-development open-source freedom kotlin