Microsoft Project - Microsoft Office Project gives you robust project management tools with the right blend of...
Baïkal - Cal and CardDAV server
GanttProject - Project scheduling and management tool
Radicale - The Radicale Project is a complete CalDAV (calendar) and CardDAV (contact) server solution.
ProjectLibre - Home | Projectlibre
SOGo - SOGo is groupware server with a focus on scalability and open standards.