mailcow is a mail server suite. ...more

OX Open-Xchange is a web-based communication, collaboration and office productivity software. ...more

Qortex is a project management software. ...more

iRedMail is a free, OpenSource mail server. ...more

Zarafa is an open-source groupware application. ...more

Horde is a free web-based groupware. The components of this groupware rest on the Horde framework. This PHP-based framework provides all the elements required for rapid web application development. ...more

Kopano is an open-source groupware application suite originally based on Zarafa. ...more

Zimbra offers an open source email platform for the enterprise. ...more

Kolab Now is a web-based email and groupware service, based completely on free and open-source software. ...more

Zentyal is an open source email and groupware solution based on Ubuntu Linux. ...more

ownCloud is a free and opensource file sync and share app which is self hosted. ...more