Outlook Connector for MDaemon 

Outlook Connector unlocks the collaborative functions of Microsoft Outlook using MDaemon as the mail server platform. Outlook users can share Calendar, Tasks, Contacts, Notes, and Journal folders without the expense or expertise required by Exchange.
collaboration share contacts share calendar share tasks groupware e-mail email mdaemon exchange alternative outlook plug-in outlook plugin

GroupWare 

MDaemon GroupWare unlocks the collaborative functions of Microsoft Outlook using MDaemon as the mail server platform. Outlook users can share Calendar, Tasks, Contacts, Notes, and Journal folders without the expense or expertise required by Exchange.
share contacts share calendar share tasks groupware e-mail email server server pop3 imap ldap smtp mail server http