Free collaboration system software for linux

Library Accounting System is a Web-based library system for cataloging books, journals, magazines, and newspapers.
Unlike the majority of Web-based systems, it is intended for individual users rather than for institutional use.
Library Accounting System supports loaning and viewing of records, automatic downloading of book information, and call number creation.
Enhancements:
- This release adds the ability to store movie details.

All System Info is a system info SuperKaramba theme. Simple english version...
It shows:
- System Info
- CPU usage
- Network Usage
- Memory Load
- HDD usage

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.

Gecko Multimedia System is a complete media solution, able to play almost all media types and supports scheduled tv-recording from online tv-guides.

It is intended to replace your VCR, DVD, MP3- and CD-player into one single software-unit. It is mainly for use in Linux-systems (well, its the only system Ive tried it on).

Please note that Gecko requires VRD to be able to record television. VRD is not yet 100% functional.

Yoxel Systems is a software product management and customer feedback management solution. Yoxel Systems is a connected system to track product requirements, manage product life cycles, provide online customer support, and accumulate support knowledge.

Yoxel Systems is more than yet another bug tracker, helpdesk or project organizer. It bridges request tracking and project management by providing a flow manager that walks your team from request prioritization and project planning through project implementation to project completion.

Unlike web based portals from SalesForce.Com or SugarCRM Yoxel Systems is tailored specifically for software development companies.

WHY YOXEL SW?

A role based, easy to use and very flexible request tracking system with customizable workflow, powerful filtering and advanced reporting capabilities.

Product management capabilities and agile methods of development on top of your existing Bugzilla/Mantis/GNATS/...

Automated process for product requirements management and product development planning/tracking.

Efficient collaboration between R&D, marketing and customer support teams to increase relevancy and value of your product releases.

Improved customer support that gives you fast and more accurate customer feedback on product requests and priorities.

WHY YOXEL IT?

The work of IT departments is not just about supporting users and resolving various network issues, it is also about implementing complex projects concerning. infrastructure and efficiency of your systems and business:

YOXEL IT is the solution for your IT department:

Ticket Tracking System is flexible and powerful, packed with features you expect from professional IT helpdesks.

Yoxel IT Project Management System extends TTS allowing your IT specialists to collaborate, plan and track complex IT projects.

eGroupWare is a multi-user, web-based groupware suite developed on a custom set of PHP-based APIs.
Main features:
- email
- addressbook
- calendar
- infolog (notes, to-dos, phone calls)
- content management
- forum
- bookmarks
- wiki
Version restrictions:
- EGW does not need to be compiled. EGW is composed only of PHP, HTML and image files
- EGW needs a Database server. MySQL or PostgreSQL or MSSQL preferred. Can be local or remote.
- EGW needs a php4 enabled web server. Apache1.3.x with PHP4.3.x preferred.
- EGW may need an e-mail server. Can be local or remote and IMAP or POP.
- Please read the requirements and install-how-to in the download area.
Enhancements:
- addressbook completly rewritten (Group-addressbooks, Organisation-views, improved LDAP support)
- new fully integrated tracker application used by the project itself since some time
- new imap backend and many improvments for FMail
- Gallery2 port for eGroupWare
- many improvments in nearly all applicatons