Citadel/UX (typically referred to simply as "Citadel") is a collaboration suite (messaging and groupware) that is descended from the Citadel family of programs which became popular in the 1980s and 1990s as a bulletin board system platform. It is designed to run on open source operating systems such as Linux or BSD. Although it is still being used widely on bulletin board systems, in 1998 the developers began to expand its functionality to a general purpose groupware platform.

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  • Citadel/UX (typically referred to simply as "Citadel") is a collaboration suite (messaging and groupware) that is descended from the Citadel family of programs which became popular in the 1980s and 1990s as a bulletin board system platform. It is designed to run on open source operating systems such as Linux or BSD. Although it is still being used widely on bulletin board systems, in 1998 the developers began to expand its functionality to a general purpose groupware platform. In order to modernize the Citadel platform for the Internet, the Citadel/UX developers added functionality such as shared calendars, instant messaging, and built-in implementations of Internet protocols such as SMTP, IMAP, Sieve, POP3, and GroupDAV. All protocols offer OpenSSL encryption for additional security. Users of Citadel/UX systems also have available to them a web-based user interface which employs Ajax style functionality to allow application-like interaction with the system. Citadel uses the Berkeley DB database for all of its data stores, including the message base. The software is open source, and released under the GPL license. Its developers assert that Citadel is one of the few products in this category that is built as end-to-end free software, while most others offer only a feature-limited free version, choosing instead to require a paid license for their full-featured versions.
  • Citadel/UX ist eine freie Groupware mit Wurzeln in der BBS-Szene. Es bietet Funktionen für E-Mail, Kontakte, Kalender und Aufgaben. Citadel/UX wird von einer freien Entwicklergemeinde seit 1994 unter der GNU General Public License weiterentwickelt.
  • Citadel — это open source веб-приложение для совместной работы группы людей. Приложение Citadel написано на PHP и платформонезависимо. Использует веб-сервер Apache и встраиваемую базу данных Berkeley DB. В состав включено большое количество приложения для реализации различных задач: групповой календарь и планировщик; адресная книга; встроенный почтовый клиент, работающий по протоколу IMAP, POP3, ESMTP, со встроенной поддержкой аутентификации пользователя, сортировки и фильтрации сообщений, списком рассылки; чат, форум, открытые и приватные комнаты общения; информационный журнал, который содержит список дел (ToDo), заметки (Notes); средство мгновенного обмена сообщениями; графическое управление группами и отдельными пользователями, как и их почтовыми учётными записями и LDAP; Особенности Поддержка протоколов HTTP, telnet, SSH; SSL/TLS шифрование для всех протоколов; Веб-интерфейс реализованый с использованием технологии AJAX; Фильтрация и проверка писем при помощи SpamAssassin и ClamAV antivirus.
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  • citadel.org
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  • Citadel/UX
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  • Free software
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  • Citadel/UX (typically referred to simply as "Citadel") is a collaboration suite (messaging and groupware) that is descended from the Citadel family of programs which became popular in the 1980s and 1990s as a bulletin board system platform. It is designed to run on open source operating systems such as Linux or BSD. Although it is still being used widely on bulletin board systems, in 1998 the developers began to expand its functionality to a general purpose groupware platform.
  • Citadel/UX ist eine freie Groupware mit Wurzeln in der BBS-Szene. Es bietet Funktionen für E-Mail, Kontakte, Kalender und Aufgaben. Citadel/UX wird von einer freien Entwicklergemeinde seit 1994 unter der GNU General Public License weiterentwickelt.
  • Citadel — это open source веб-приложение для совместной работы группы людей. Приложение Citadel написано на PHP и платформонезависимо. Использует веб-сервер Apache и встраиваемую базу данных Berkeley DB.
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  • Citadel/UX
  • Citadel/UX
  • Citadel (groupware)
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  • Citadel/UX
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