Alfresco is the leading open source alternative for enterprise content management (ECM). It couples the innovation of open source with the stability of a true enterprise-class platform. The open source model allows Alfresco to use open source technologies and contributions from the open source community to get higher quality software produced more quickly at much lower cost.
Alfresco is led by John Newton, founder of Documentum, and John Powell, former COO of Business Objects, and is backed by Accel Partners, Mayfield Fund and SAP Ventures.

BackupPC is a high-performance, enterprise-grade system for backing up Linux and WinXX PCs and laptops to a server’s disk. It is highly configurable and easy to install and maintain. The program is written in Perl and extracts backup data via SMB using Samba, tar over ssh/rsh/nfs, or rsync. It is robust, reliable, well documented and freely available as Open Source on SourceForge.
Key Features

Optional compression support further reducing disk storage. Since only new files (not already pooled) need to be compressed, there is only a …

WPKG is an automated software deployment, upgrade and removal program for Windows.

Run virtual machines on your Windows or Linux PC with VMware Player 2.5. This free desktop virtualization software application makes it easy to operate any virtual machine created by VMware Workstation, VMware Fusion, VMware Server or VMware ESX, as well as Microsoft Virtual Server virtual machines or Microsoft Virtual PC virtual machines. With VMware Player you can import third party backup images including Symantec Backup Exec System Recovery (formerly called Live State Recovery) images, Norton Ghost 10 images, Norton Save & Restore images, StorageCraft ShadowProtect images, and Acronis True Image …

Open-Xchange Server 5 delivers more than users expect. The rich interface provides a dynamic new experience. Secure and robust, OX delivers the power to share email, calendar, contacts, tasks and documents. In fact, OX includes 11 collaboration modules, more than any other groupware product.
You can access OX from almost any browser, rich client, or mobile device. It puts your mission-critical data at your fingertips. Through “OXtenders”, Open-Xchange connects to proprietary and open source rich clients and PDA’s. Users already accustomed to Microsoft Outlook need not make any changes in their …

OpenOffice.org 2 is the leading open-source office software suite  for word processing, spreadsheets, presentations, graphics, databases and more. It is available in many languages  and works on all common computers. It stores all your data in an international open standard format and can also read and write files from other common office software packages. It can be downloaded and used completely free of charge for any purpose.