SOGo - SOGo is groupware server with a focus on scalability and open standards.
Travrek CRM - Other Travel Arrangement
Baïkal - Cal and CardDAV server
CruiseBase - Other Travel Arrangement
Radicale - The Radicale Project is a complete CalDAV (calendar) and CardDAV (contact) server solution.
Smartvel - Smartvel provides the best destination content technology to enhance your customer journey. Are you ready to enhance your clients experience?