Unix implementation, a BBS method begun in 1981 with a CP/M-based BBS

Modular, extensible, notebook framework to make cross-platform interoperating prototype implementations. Allows shared input and display of sketches, text, equations, images, graphs, other data types. Tools for authentication, other services.

A group-enabled audio/jukebox application. BSD-style license.

A distributed group e-mail application for software/helpdesk functions, GPL license.

A planned PHP-based groupware including calendar, address book, forum, ticket system, WebMail, CRM and DMS.

Summary of open source groupware software.

Web-based open source groupware written in Java/JSP with support for PostgreSQL, Oracle and SQL Server.

WEB-based collaboration server: Mail, Organiser and Documents manager.

A web-based Italian office communication suite for archiving digital documents. Works with Hylafax server.

A servlet implementation of an open protocol GroupWare product. Backend (search engines, news, weather, POP3/IMAP/LDAP/NNTP, database) is based on other open source packages.

Lucane is a free groupware platform written in Java, designed with extensibilty in mind.

Metadot Portal Server is an open-source software for building powerful websites and portals in just a few clicks. Provides content management and collaboration features and also customization functionalities like My Yahoo (Perl, Mysql and Linux).

Moregroupware is a Web-based Groupware written in PHP4. Includes modules like calendar, notes, todo, and contacts. It is database abstracted and uses a template engine for output.

Topic Map based java system, "a testbed for developing tools for Web collaboration", Apache license.

onShore, a consulting firm, has a web-based, multi-user time-billing tool, GPL license.

OpenACS (Open Architecture Community System) is an advanced toolkit for building scalable, community-oriented web applications. If you're thinking of building an enterprise-level web application, OpenACS is a solid, proven foundation that will give you a 3-6 month headstart.

GPL PHP groupware package targeted at project development. Manages documents, tasks, requests, basic newsletters, knowledge entries, stores e-mail copies, e-mail repository address. Requires LAMP.

phpBB is an open source, flat style, message board written in PHP. It has all standard message board features.

Open Source collaboration software written in PHP. Includes features such as email, shared calendar, task list, address book, inventory, trouble ticket system, and many others.

Web-based groupware tool which includes calendar, project-management, time-card management, PDA synchronization, email, voting system and personal to-do list management

A useful intranet/groupware tool and application framework. Written and implemented with PHP. Goal is to be a simple, cross-platform, fast way to access/share almost any kind of information, GPL license.

Web based groupware providing group scheduling, addressbooks, shared folders.

Zope-based program that provides an IMAP based web mail client, contact and address book, notes, ToDo's, calendar and workgroup sharing.

A modular intranet/extranet solution based on the Ampoliros PHP web applications platform and taking advantage of Ampoliros features. GNU license.