Free zimbra collaboration suite software for linux

Zimbra Collaboration Suite project is a client/server technology for enterprise messaging and collaboration.
Zimbra delivers innovation for both the administrator and the end-user as well as compatibility with existing infrastructure and applications (both open source and proprietary).
The Zimbra Collaboration Suite provides support for email, contacts, and group calendaring, and consists of a server and client.
Main features:
Administrator Benefits
- Online move, backup and recovery of individual or a group of mailboxes
- Compatibility with Active Directory and existing LDAP directories
- Native hierarchical storage management and clustering
- Web services integration with existing enterprise applications
- Integrated anti-spam and anti-virus
End-User Benefits
- Browser based client with search, shared calendar and mail that is integrated with contacts and calendar
- Support for Outlook: calendar, mail, contacts and offline mode
- Support for mobile devices: Blackberry, Treo and etc
- Support of Windows, Apple and Linux computer.
Whats New in 5.0.0 Beta 1 Development Release:
- This is the first release in the 5.0.0 release cycle.
- New features include IM, Tasks, Standard Client autocompletion, and keyboard navigation.
- Updates have been made to migration wizards and apple/outlook connectors.
Whats New in 4.5.6 Stable Release:
- Support for an automated MySQL database corruption check that will send a notification to the admin.
- Spam training has been enhanced by allowing programmatic scanning of folders without requiring a password.
- Admins can get backup and restore complete notifications sent via email.
- .Doc and .pdf files open correctly in Zimbra Web Client.
- iSync will not duplicate the calendar, and iSync Connector works correctly with Mac OS X 10.4.10.
- Servers automatically start after a ZCS upgrade.
- Web-based cross-mailbox discovery is available for the optional Zimbra Archiving and Discovery module.

DeskNow project is a fully featured and easy to use mail and collaboration server that can handle all the communication and collaboration needs of your company.
Main features:
- fully featured mail server
- advanced antispam technologies, antivirus integration and content filtering
- dynamic webmail interface
- document management
- advanced calendaring with meeting planning, free/busy search, shared calendars, task lists, resource booking, iCal publishing (Mozilla Sunbird, Apple iCal)
- Outlook connector to integrate personal and group calendars, tasks, contacts
- SyncML synchronization with Palm, PocketPC, BlackBerry and most mobile phones
- secure Jabber instant messaging with integrated web client
- automatic authentication and account import with Active Directory and LDAP servers
Enhancements:
- This version introduces minor improvements to IMAP import and features improved SyncML duplicate detection and a maxhops configuration setting.

OfficeSpot.Net CS contains following packages: - eGroupWare - OpenLDAP - DBMail - ClamAV - APC - Memcache - MySQL
Enhancements:
- This release contains updated versions of eGroupWare (1.4), DBMail (latest stable SVN revision), and ClamAV (0.90.3).
- The installation process was streamlined and the online documentation was updated.

Kumula is designed to become a complete software suite for business needs. Started as software for consultants, it is flexible enough to be used by almost any class of business. Kumula Business Suite provides a small CRM (Clients) and a Mini-DMS (Documents), enhanced by some other applications. Everybody is invited to use it or enhance it.
Kumula is written in Qt (http://www.trolltech.com/products/qt/), PyQt and Python using the fabulous Eric3 development environment.
Enhancements:
- This is the last stable release before Ill port it to Qt4 (as "Kumula2"), so I feel free to call it "1.0".
- The whole suite is becoming bigger and bigger, so now its time to split it. This is the base package with the central Kumula library and the most important applications. The package contains the following programs:
BizCalc:
- The modular designed calculator tool, coming with a spartanic RPN calculator and an unit conversion module
Clients:
- The client/customer management application, with many improvements (like individual client attributes) and the modules "Info" (logo+description), "Contacts" (for managing contact persones, addresses and communication data) and "Tickets" (for letting the users talk about a client like on a web forum)
Configurator:
- The central configuration utility, to setup the database access and the user interface (menus, icons, ...) of all Kumula applications.
Users:
- A small tool for managing the people using Kumula.
- Further application will be provided in separate packages for easier maintenance and faster bugfixes and updates.

Buni Meldware Communication Suite (MCS) is a platform-independent groupware package consisting of:
- Meldware Mail
- Meldware Calendar
- Meldware Webmail
- Meldware Secure Administration System
Together the package provides support for thousands of users concurrently to send and receive email and to schedule meetings. MCS uniquely allows you to store all messages and scheduling events in nearly any database and runs on nearly all popular software and hardware platforms.
MCS commitment to platform and database agnosticism aims to meet increasing business requirements to maximize ease and flexibility of managing and accessing data as well as putting a premium on interoperability.
Additionally, while the scheduling and calendaring services can be installed separately, the integrated feature set provides both a distinctive and powerful experience to both users and server-side Mail Based Applications and Collaboration Based Application Services.
The MCS platform provides security integration using LDAP sources including Microsoft Active Directory as well as flat-file and database sources.
Additionally, extensible security allows custom authentication/authorization sources.
Enhancements:
- This is the first milestone release with WCAP, freebusy for webmail, and mature IMAP all together.
- It has undergone extensive hardening, dogfooding, and QA testing.
- The WCAP protocol for calendaring now works well for Thunderbird and Lightning 0.3.
- Webmail calendaring was greatly improved.
- The abillity to download attachments has been added to the webmail interface.
- Numerous performance improvements have been made in SMTP, IMAP, and MIME parsing since 1.0-M7.

Openwall tcb suite package contains core components of our tcb suite implementing the alternative password shadowing scheme on Owl.

It is being made available separately from Owl primarily for use by other distributions. Note that you need to have the password hashing framework introduced with crypt_blowfish patched into glibc to compile and use this.

The package consists of three components: pam_tcb, libnss_tcb, and libtcb.
pam_tcb is a PAM module which supersedes pam_unix. It also implements the tcb password shadowing scheme.

The tcb scheme allows many core system utilities (passwd(1) being the primary example) to operate with little privilege. libnss_tcb is the accompanying NSS module. libtcb contains code shared by the PAM and NSS modules and is also used by user management tools on Owl due to our shadow suite patches.

Soma is a suite of programs that let you play and schedule audio files from the Web.
Soma suite supports extra utilities using run-time loadable modules and includes a broadcasting scheduler, a tool to control it via TCP/IP, and an utility to check configuration file syntax.
Soma project started in summer 2003 to manage the digital version of an activists radio old spools.
The first release just gave just the chance to play random some audio files in a directory using an external program (at that time mpg123). In despite of that this software was never used, i kept on thinking about soma project for some weeks, until i started directly to work with a group called Reload, which was experimenting at the time a project called "eterete" and creating a place for a web radio at Pergola Tribe (a selfmanaged house in Milan).
We used, of course, a release, which was a little bit better to manage the radio-playlist and of course we implemented the software itself. From september till december soma became a software suite, configurable through file and (remote administration...). Thats thanks to the relationships and the inputs that such a community like Reload can create.
A group of passionate activists was able to make broadcastings and broadcast schedules, to find out new problems and to give implementation advices. They also suggest me the idea that soma (originally a simple play-list manager) could become a programs suite, which has a player, a software for deferred broadcasting, a more user friendly admininstration, documentation and distribution.
Some time after came somaplayer and somaadmin. The player was still very behind compared to my implementation ideas. Somadmin was straight away on line and advertised on radio.inventati.org/somadmin/
In January 2004 we showed Soma at the first italian (web and air-waves) radio meeting in Naples.The meeting was technologically and politically profitable and it was an attempt to build up a real radio-network.
Radio.inventati.org was actually the only example od direct cooperation among even very different people: individuals, improvised groups, very old and movement radios and experiences from overseas countries.
On the web site there are occasional streamings, weekly streamings, and 24hrs music flows.
The object of the technical research was a digital environment, which could let individuals or whole communities gain access to a common schedule with resum?s, repetitions, deferred programs, live broadcastings, regular broadcastings as one national and international network.
Soma could satisfy this need and could be easly managed through the web thanks to somadmin, which could update the soma admin in real time.
The developments went on. Somaplayer is now reality. The only music player which can stream directly an mp3, an ogg vorbis, a wav, a track from an audio cd or a streaming directly on an icecast server (icecast 2 or shoutcast) or just play it on a computer using sound drivers or sound daemons.
At the moment more other people work at this project, who debug the software, write docs, work at the website and make installation packages (for debian).
Enhancements:
- This release fixes three bugs related to group permissions, the 31st of months, and an error in libsoma related to buffers and protocols.