Citadel is an advanced messaging and collaboration system for groupware and BBS applications. Users can connect to Citadel using any telnet, WWW, or client software. Among the features supported are public and private message bases (rooms), electronic mail, real-time chat, paging, shared calendaring, address books, mailing lists, and more. Unlike other collaboration servers, Citadel provides its own data stores and is therefore extremely easy to install; you don't have to "bring your own" email and database because they're built in. The server is multithreaded and scalable. In addition, SMTP, IMAP, and POP3 servers are built-in for easy connection to Internet mail. Citadel is both robust and mature; it has been in production since 1987.
WebCit is a Web-based, AJAX-enabled frontend to the Citadel groupware/collaboration system. It is an attractive Web middleware layer that allows user-friendly access. By combining WebCit and Citadel, you can have a versatile online environment with many users concurrently accessing the same system using the user interface of their choice (text, Web, or downloaded client software).
Looking for an "Exchange Killer?" Try Citadel.
Years ago, users expected their electronic mail systems to send and receive
messages, and not much else. Today’s users, however, are more
sophisticated. They expect Personal Information Manager (PIM) functions
such as calendars and address books, a choice of access methods, and a
variety of groupware functions. Yet the goal of providing an easily
deployable open source groupware platform has, until recently, been somewhat
elusive. Most of the popular choices have been built as traditional web
applications, requiring a system administrator to install and configure a
mail server, a web server, and a database server before being able to
begin the groupware installation. Moreover, the resulting functionality has
followed a cookie-cutter style modeled after proprietary systems that some
consider outdated. This is why you might be surprised to learn about the
existence of a project that not only solves the complexity problem, but takes a fresh new approach to groupware.
Citadel is an open source groupware server that has
its roots in online communities. You may remember the Citadel BBS’s of the 1980's and 1990's; today’s groupware platform carriessame
lineage. But to write off Citadel as an overgrown BBS package would be an
unfair underestimation of the powerful abilities of this impressive
platform. While most groupware systems center around the automation of
business processes, Citadel offers a platform that you can build a community
around. It centers around the idea of connecting people together in real
time using a set of tools that focuses on people, not processes.
System administrators will find Citadel refreshingly easy to install.
There is no need to "bring your own" mail server, web server, or database
server. Citadel has all of its data stores and protocols built in. It
uses the powerful Berkeley DB [http://www.sleepycat.com] database for all
of its storage needs. All of the popular electronic mail protocols are
built in, including ESMTP, POP3, and IMAP, as well as GroupDAV for
connecting popular open source PIM clients such as Kontact and Evolution.
There is no need for the tedious mucking about with cryptic Sendmail
configuration files or obscure Cyrus commands; everything is configurable
through an easy to use browser-based interface.
For those who are nervous about the prospect of compiling software from
source, Citadel provides an "Easy Install" script that handles this task
for you. Entering one command at a shell prompt downloads an install
script from the Citadel project's download server, and performs the entire