Citadel

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.

Website: http://www.citadel.org/doku.php

eGroupWare

eGroupWare is an Open Source enterprise groupware application, which will help your team collaborate much easier with each other. With eGroupware you will be able to manage your business contacts, meetings and appointments, todo schedules and many more for your whole business.

eGroupWare is a server-based tool. It has its own web-interface and you are able to access your data from any platform all over the planet. eGroupWare is also accessible via groupware clients, such as Kontact, Evolution, Outlook and also with your mobile or PDA via SyncML.

Website: http://www.egroupware.org/

Group-Office

Group-Office is a Groupware suite containing a base system and different modules. The modules are designed in a way that groups of people can collaborate online. Shared calendars, addressbooks, projects, files and e-mail are the key features of the project. Users use their favorite browser to access their groupware from all over the world. Combined with the powerful Linux operating system it is a complete enterprise solution for the small to medium enterprise.

Website: http://www.group-office.com/

Horde Groupware

Horde Groupware is a free, enterprise ready, browser based collaboration suite. Users can manage and share calendars, contacts, tasks and notes with the standards compliant components from the Horde Project. Horde Groupware bundles the separately available applications Kronolith, Turba, Nag and Mnemo.

It can be extended with any of the released Horde applications or the Horde modules that are still in development, like a file manager, a bookmark manager, a forum or a wiki.

Website: http://www.horde.org/groupware/

IGSuite

IGSuite is a web-based groupware collaboration suite. It gives you a “box” of applications that includes wiki, email, documents, calendar, tasks, fax, contacts, notes, links, and more. The power of collaboration comes in when these individual suite components are shared and used within a group. It strives to provide location independence, platform independence, machine independence, and browser independence.

Website: http://www.igsuite.org/

Kolab

Kolab is a groupware system that provides a comprehensive and flexible solution for workgroups. Email, contacts, and group calendars can be managed via the Web, Windows/Outlook, and Linux/KDE. It supports offline synchronization and full seamless support of mixed client environments because the Kolab-XML storage format is fully open and avoids MAPI/TNEF.

Website: http://www.kolab.org/

OBM

OBM is a groupware, email, LDAP, Windows PDC, CRM, and project management application. It is mainly used as an Exchange or Notes/Domino groupware and mail server replacement, as an LDAP directory, as a Windows PDC, as a contact and customer database, as a project management tool, or as any combination of these functions. It provides groupware (calendars, contacts, and tasks) connectors for Outlook, Thunderbird/Lightning, and PDAs. It supports internationalization and themes. It is highly scalable, and is used by sites from five to many thousands of users.

Website: http://obm.org/doku.php

Open-Xchange

The Open-Xchange Server allows you to create, store and link appointments, contacts, tasks, email, bookmarks, documents, forums and many more elements and share them with other users.

Website. http://www.open-xchange.com/en/oxpedia

phpGroupWare

phpGroupWare is a PHP-based, multi-user groupware application. It integrates about 50 web-based tools, such as Calendar, Addressbook, advanced Projects manager, Todo List, Notes, Email, Newsgroup- and Headlines Reader, Filemanager, etc. The calendar supports repeating events and will alarm you for the upcoming events.

The phpGroupware system as a whole supports user and admin preferences, themes manager, user permissions and groups and multi-language support. It includes modules to setup and modify the working environment. The phpGroupware suite is built on an advanced Application Programming Interface (API).

Website: http://www.phpgroupware.org/

Simple Groupware

Simple Groupware is a complete enterprise application offering email, calendaring, contacts, tasks, document management, synchronization with cell phones and Outlook, full-text search, and much more. Simple Groupware combines standards like RSS, iCalendar, vCard, IMAP, POP3, SMTP, CIFS, CSV, WebDAV, LDAP, and SyncML under one platform. Unlike other groupware software, Simple Groupware contains the programming language sgsML to enable the quick customization and creation of powerful Web applications.

Website: http://www.simple-groupware.de/cms/

SOGo

SOGo is a collaboration suite (or groupware) with speed and scalability in mind. 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 (CalDAV, CardDAV and GroupDAV, vCard, and vCalendar/iCalendar) and thereby enables the use of many clients and the reuse of any existing infrastructure.

Website: http://www.sogo.nu/english.html

Tiki Wiki CMS Groupware

Tiki Wiki CMS Groupware is a full-featured, Web-based, multilingual, tightly integrated, all-in-one wiki, CMS, and groupware. Tiki can be used to create all kinds of Web applications, sites, portals, knowledge bases, intranets, and extranets. Tiki offers a very large number of features “out-of-the-box”. It is highly configurable and modular. All features are optional and administered via a Web-based interface. Major features include a robust wiki engine, news articles, discussion forums, newsletters, blogs, file and image galleries, bug and issue trackers, a link directory, polls/surveys and quizzes, FAQs, a banner management system, calendar, maps, mobile access, RSS feeds, a category system, tags, an advanced themeing engine (Smarty), spreadsheet, live support, shoutbox, inter-user messaging, menu generator, advanced permission system for users and groups, internal search engine, external authentication support, and more.

Website: http://info.tikiwiki.org/tiki-index.php

Tine 2.0

Tine 2.0 is a Web-based groupware solution that focuses on usability and correctness. To achieve these goals, the project uses usability experts and covers most of the code by unit tests. It contains support for contacts, tasks, CRM, VoIP integration, a time tracker, ActiveSync, and a flexible rights management system.

Website: http://www.tine20.org/

Zimbra

Zimbra is a next-generation enterprise messaging and collaboration system. It features an Ajax Web client with conversation views, fast email search, Web service mash-ups, shared calendars, document authoring, and IM. The server also syncs to MS Outlook (via MAPI), the Apple desktop (via iSync, iCal, and CalDAV), POP/IMAP clients, and mobile devices (BlackBerry, smart phones, HTML Web browsers). A version of the Web client, Zimbra Desktop, also works offline with any POP/IMAP server. Administrators can control live backup/restores of individual or groups of mailboxes, hierarchical storage (HSM) and clustering, LDAP directory configuration, Web services integration with existing enterprise applications, and integrated anti-spam and anti-virus.

Website: http://www.zimbra.com/