XEN

Xen is a free virtual machine monitor for IA-32, x86-64, IA-64 and PowerPC architectures. It is software that runs on a host operating system and allows one to run several guest operating systems on top of the host on the same computer hardware at the same time. Modified versions of Linux and NetBSD can be used as hosts. Several modified Unix-like systems may be employed as guest systems; on certain hardware, since Xen version 3.0, unmodified versions of Windows and other systems can also be used as guests.

Xen originated as a research project at the University of Cambridge, led by Ian Pratt, senior lecturer at Cambridge and founder of XenSource, Inc. This company now supports the development of the open source project and also sells enterprise versions of the software. The first public release of Xen was made available in 2003.

More: http://en.wikipedia.org/wiki/Xen

Beagle

Beagle is a search tool that ransacks your personal information space to find whatever you're looking for.

More technically, Beagle is a Linux desktop-independent service which transparently and unobtrusively indexes your data in real-time.

More: http://beagle-project.org/About
Download: http://beagle-project.org/Getting_Started

PHP

PHP
PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.

More.... http://php.net/

JForum

JForum is a powerful and robust discussion board system implemented in Java^tm. It provides an attractive interface, an efficient forum engine, an easy to use administrative panel, an advanced permission control system and much more.

Built from the ground up around a MVC framework, it can be deployed on any servlet container or Application Server, such as Tomcat, Resin and JBoss. Its clean design and implementation make JForum easy to customize and extend.

Best of all, JForum is freely available under the BSD Open Source license.

If you or your company are searching for a serious and robust Forum Software, JForum is the right choice.

More: http://www.jforum.net/
Download: http://www.jforum.net/download.jsp

Debian

The Debian Project is an association of individuals who have made common cause to create a free operating system. This operating system that we have created is called Debian GNU/Linux, or simply Debian for short.

An operating system is the set of basic programs and utilities that make your computer run. At the core of an operating system is the kernel. The kernel is the most fundamental program on the computer and does all the basic housekeeping and lets you start other programs.

Debian systems currently use the Linux kernel. Linux is a piece of software started by Linus Torvalds and supported by thousands of programmers worldwide.

However, work is in progress to provide Debian for other kernels, primarily for the Hurd. The Hurd is a collection of servers that run on top of a microkernel (such as Mach) to implement different features. The Hurd is free software produced by the GNU project.

A large part of the basic tools that fill out the operating system come from the GNU project; hence the names: GNU/Linux and GNU/Hurd. These tools are also free.

Of course, the thing that people want is application software: programs to help them get what they want to do done, from editing documents to running a business to playing games to writing more software. Debian comes with over 15490 packages (precompiled software that is bundled up in a nice format for easy installation on your machine) — all of it free.

It's a bit like a tower. At the base is the kernel. On top of that are all the basic tools. Next is all the software that you run on the computer. At the top of the tower is Debian — carefully organizing and fitting everything so it all works together.

MORE........ http://www.us.debian.org/intro/about

Download: http://www.us.debian.org/CD/

KANOTIX

KANOTIX

Kanotix is a rock-solid Linux based on Debian-Sid, which contains the newest packages and recognizes more modern hardware than any other operating system in use today.

Kanotix is assembled for 32 Bit i586 and for AMD 64 using the most up-to-date kernel with unique patches.

Kanotix will run as a LIVE-CD on practically any computer -- automatically detecting and configuring virtually any piece of hardware. It is ideal for analysis, data rescue, forensic work, removal of viruses on Win-PCs - or simply for safe surfing and mailing in an internet cafe. It installs to your hard drive in just a few minutes and is ideal for use on your desktop workstation or notebook, or as a server.

More Info: http://kanotix.com/
Download: http://kanotix.com/

Banshee

Import, organize, play, and share your music using Banshee's simple, powerful interface.

Rip CDs, play and sync your iPod, create playlists, and burn audio and MP3 CDs. Most portable music devices are supported.

Banshee also has support for podcasting, smart playlists, music recommendations, and much more

More...

Download: http://banshee-project.org/Getting_Started

CentOS

CentOS

CentOS is an Enterprise-class Linux Distribution derived from sources freely provided to the public by a prominent North American Enterprise Linux vendor. CentOS conforms fully with the upstream vendors redistribution policy and aims to be 100% binary compatible. (CentOS mainly changes packages to remove upstream vendor branding and artwork.) CentOS is free.

FreeBSD

About FreeBSD

What is FreeBSD?

FreeBSD is an advanced operating system for x86 compatible (including Pentium® and Athlon™), amd64 compatible (including Opteron™, Athlon™64, and EM64T), ARM, IA-64, PC-98 and UltraSPARC® architectures. It is derived from BSD, the version of UNIX® developed at the University of California, Berkeley. It is developed and maintained by a large team of individuals. Additional platforms are in various stages of development.

Cutting edge features

FreeBSD offers advanced networking, performance, security and compatibility features today which are still missing in other operating systems, even some of the best commercial ones.

Powerful Internet solutions

FreeBSD makes an ideal Internet or Intranet server. It provides robust network services under the heaviest loads and uses memory efficiently to maintain good response times for thousands of simultaneous user processes.

Run a huge number of applications

The quality of FreeBSD combined with today's low-cost, high-speed PC hardware makes FreeBSD a very economical alternative to commercial UNIX® workstations. It is well-suited for a great number of both desktop and server applications.

Easy to install

FreeBSD can be installed from a variety of media including CD-ROM, DVD-ROM, floppy disk, magnetic tape, an MS-DOS® partition, or if you have a network connection, you can install it directly over anonymous FTP or NFS. All you need are these directions.

FreeBSD is free

While you might expect an operating system with these features to sell for a high price, FreeBSD is available free of charge and comes with full source code. If you would like to purchase or download a copy to try out, more information is available.

Contributing to FreeBSD

It is easy to contribute to FreeBSD. All you need to do is find a part of FreeBSD which you think could be improved and make those changes (carefully and cleanly) and submit that back to the Project by means of send-pr or a committer, if you know one. This could be anything from documentation to artwork to source code. See the Contributing to FreeBSD article for more information.

Even if you are not a programmer, there are other ways to contribute to FreeBSD. The FreeBSD Foundation is a non-profit organization for which direct contributions are fully tax deductible. Please contact board@FreeBSDFoundation.org for more information or write to: The FreeBSD Foundation, 7321 Brockway Dr., Boulder, CO 80303, USA.

Know More: http://www.freebsd.org/about.html

Download

Ubuntu

Ubuntu is a community developed operating system that is perfect for laptops, desktops and servers. Whether you use it at home, at school or at work Ubuntu contains all the applications you'll ever need, from word processing and email applications, to web server software and programming tools.

Ubuntu is and always will be free of charge. You do not pay any licensing fees. You can download, use and share Ubuntu with your friends, family, school or business for absolutely nothing.

We issue a new desktop and server release every six months. That means you'll always have the the latest and greatest applications that the open source world has to offer.

Ubuntu is designed with security in mind. You get free security updates for at least 18 months on the desktop and server. With the Long Term Support (LTS) version you get three years support on the desktop, and five years on the server. There is no extra fee for the LTS version, we make our very best work available to everyone on the same free terms. Upgrades to new versions of Ubuntu are and always will be free of charge.

More Info: http://www.ubuntu.com/products/WhatIsUbuntu
Download: http://www.ubuntu.com/getubuntu/download

Knoppix

KNOPPIX

KNOPPIX is a bootable Live system on CD or DVD, consisting of a representative collection of GNU/Linux software, automatic hardware detection, and support for many graphics cards, sound cards, SCSI and USB devices and other peripherals. KNOPPIX can be used as a productive Linux system for the desktop, educational CD, rescue system, or adapted and used as a platform for commercial software product demos. It is not necessary to install anything on a hard disk. Due to on-the-fly decompression, the CD can have up to 2 GB of executable software installed on it (over 8GB on the DVD "Maxi" edition).

More Info: http://knopper.net/knoppix-info/index-en.html
Download: http://knopper.net/knoppix-mirrors/index-en.html