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

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.

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

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

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

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.

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

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.

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

Groupware and content management system developed in Ruby on Rails. Web site includes news, documentation and an online demonstration.