I found the below information on the Zimbra website....but i cannot find the free version of the open source edition. Can anyone offer some thoughts here?

thanks in advance.

Zimbra Collaboration Server (ZCS)

Open Source Edition

ZCS Open Source Edition is a free email and collaboration solution ideal for individuals or smaller organizations that do not require Zimbra Support, advanced administration, business continuity and only IMAP email on desktops and devices.