1. KnowledgeTree

KnowledgeTree™ is the leading commercial open source electronic document management software designed for teams and small to medium-sized organizations. Collaborate with team members, securely store ...

2. eyeOS

... or contacts manager. There are also some groupware applications, such as a group manager, a file sharing application, a group board and many more. eyeOS is Open Source, licensed under the GNU Affero ...

3. openCRX

... to customers, partners, suppliers or intermediaries. Features   Groupware openCRX features lots of groupware functionality enabling users to manage e-mails and calendars (shared ...

4. 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. ...

5. Zimbra

Zimbra is a client and server platform for next-generation messaging and collaboration. It provides administrators and their end users innovative features that solve the challenges faced by organizations ...

6. eGroupWare

eGroupWare is a free enterprise ready groupware software for your network. It enables you to manage contacts, appointments, todos and many more for your whole business. eGroupWare is a groupware server. ...

7. 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, ...