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eGroupWare is a multi-user, web-based groupware suite developed on a custom set of PHP-based APIs. Currently available modules include: email, addre...

Group-Office is a powerfull modular Internet/Intranet application framework. It features calendaring, project management, e-mail, tasks, addressbook, ...

IGSuite is a web-based (Ajax inside) Integrated Groupware Suite oriented to be a CRM solution. In the Suite you can find: IGWebMail, IGCalendar, IGCon...

Zoe is a Web based email client with a built in SMTP and POP3 server and Google-like search functionality that lives on your desktop. It is written ...

Elm Millennium Edition is an interactive mail system based on Elm 2.4. It contains enhanced MIME and character set support. A subset of UTF-8 (Unicode...

Openchange is a groupware server which intends to provide an Open Source implementation of Microsoft Exchange server.

Columba is an email client written in Java, featuring a user-friendly graphical interface with wizards and internalionalization support. Its a powerfu...

MailMan is one of the most stable, mature, and robust Web-based email systems available. The overall goal of the system is to provide the simplest pos...

GNU Mailutils contains a series of useful mail clients, servers, and libraries. These are the primary mail utilities of the GNU system. Specifically, ...

XFMail is an X11 application for receiving electronic mail. It implements most of its email functionality internally so that it does not depend on a l...