Zimbra

Zimbra is the leading open source solution for enterprise, service provider, education, and government environments; offering administrators and their end-users unmatched benefits. 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.

ZCS also includes an elegant Ajax based admin interface plus full scripting tools to manage the ZCS server. Full support is provided for standards-based APIs (IMAP / POP / iCal / CalDAV) as well as MAPI and iSync, which enable seamless compatibility with other clients like Microsoft Outlook, Apple desktop suite, and Mozilla Thunderbird.

Zimbra also offers Zimbra Mobile, which provides over-the-air "push" synchronisation to smartphones such as iPhone, Android, Windows Mobile, Nokia and Sony Ericsson as well as a Connector for BlackBerry Enterprise Server.

The Zimbra solution also has a complete high security package including built-in anti-spam and anti-virus scanning.

Now Zimbra also features Archiving and Discovery, an optional component to save and search email for various compliance issues.