Public folder

[federico23]

hello wanted to know how shared folders .... I can make them with the open source version of zimbra?

[mmorse]

Yes, right click the folder in question in the ZWC > share.
(See this blog post if you need an example: /blog/archives/2007/08/shared-folders.html)

Mail, Address Books, Calendars, Tasks, Documents, and Briefcase folders can be shared.

Calendar, Documents, Briefcase all have REST HTML interfaces - for instance:
server.domain.com/zimbra/home/username/Calendar.html

Under construction:
Bug 26764 - Contacts - REST HTML interface
Bug 26763 - Tasks - Rest HTML interface

Shares can also be configured several other ways, search the forums for CLI (zmmailbox) or soap.