1)   MDaemon 11.0.2
SMTP, POP3 Windows mail server. Exchange alternative, Outlook integration. Multi-language webmail with IMAP, SyncML for mobility. BlackBerry push email support. Strong anti-spam security and email authentication. Easy installation and remote admin.

 2)   GroupWare 1.0.6
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.

 3)   OfficeCalendar for Microsoft Outlook 2.3.2.0
Share Microsoft Outlook calendar, contact, and task information with this affordable Exchange alternative. Makes Outlook calendar sharing and Outlook group calendar scheduling easy. Works with Microsoft Outlook 2000, XP, and 2003. Free trial.

 4)   GroupOutlook 1.0.1966.32251
GroupOutlook from Amarillo Software allows you to easily and affordably share Outlook calendars, contacts, e-mail, tasks, journals and notes without Exchange Server.