Free corporate web based groupware for any business that needs cheap, reliable groupware service. Secure database, fast server. No trial periods, no hosting fees, absolutely free!

Overapps GroupWare is an instant intranet software for Windows.

ASPPack Groupware by ITCom3 is a an instant intranet software for Windows. ASPPack allows you to create a Web based GroupWare in a few minutes

The i-sense Groupware Suite is a web-based enterprise groupware application for SMEs and project teams. i-sense also offers extensive CRM and ERP functionality and is free for 3 users.

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.

Product provides real-time access to shared message folders stored on the server. From a cliental point of view, folders on MAPILab Groupware Server look and behave exactly the same as folders on Microsoft Exchange Server.

Outlook Connector for MDaemon Email Server enables you to keep in touch with employees, co-workers, customers, and vendors by sharing Outlook’s email, calendar with free/busy scheduling, address book, distribution lists, tasks, notes and more.

i-sense r2 Community Edition is a fully-featured, web-based groupware application including complete organizer and collaboration functionality. This edition is free for non-commercial use.