About Zimbra Collaboration Suite
A truly modern, innovative messaging and collaboration application. Zimbra is the leading open source solution for enterprise, service provider, education, and government environments; offering administrators and their end-users unmatched benefits. It's no wonder Zimbra is a popular choice for today's growing Mac and Linux email server base.

Ajax based web collaboration is at the heart of ZCS 5.0. The powerful web client integrates email, contacts, shared calendar, VoIP, and online document authoring into a rich browser-based interface. Also, our unique open source Zimlet technology makes it easy for you to include custom 'mash-ups' in the ZCS web client.