From author's site:

Virtualization is a technology that can benefit anyone who uses a computer, from IT professionals and Mac enthusiasts to commercial businesses and government organizations.

In essence, virtualization lets you transform hardware into software. Use software such as VMware ESX to transform or “virtualize” the hardware resources of an x86-based computer—including the CPU, RAM, hard disk and network controller—to create a fully functional virtual machine that can run its own operating system and applications just like a “real” computer.

From author's site:

QTTabBar is an Add-In that gives Tab Browsing Feature to your Explorer. Folder grouping, histories, etc.

SF- Gives Windows XP/Vista the essential tabbed browsing ability for Windows Explorer that Microsoft forgot about.

ajaxWindows is a virtual operating system that lets you store, edit and share your files using only a browser.

System Requirements:

* You must run ajaxWindows in either Firefox 2.0+ or Internet Explorer 6+
* Your browser must have javascript enabled
* You should set your browser to allow popups for ajaxwindows.com
* JRE (Sun's Java Runtime Environment) 6 Update 2. You can get it here.
* Your browser must allow cookies from ajaxwindows.com

Fedora is a Linux-based operating system that showcases the latest in free and open source software. Fedora is always free for anyone to use, modify, and distribute. It is built by people across the globe who work together as a community: the Fedora Project. The Fedora Project is open and anyone is welcome to join.

From author's site:

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).

From author's site:

Vista Transformation Pack will replace many of the resources in Windows XP/Windows Server 2003. It can change such things as:

* Boot screen
* Welcome Screen / Logon Screen
* New msstyles files (visual styles)
* New desktop and file icons
* New toolbar icons
* Progress Dialogs
* Sounds scheme
* System Tray icons
* New Wallpapers
* Windows Media Player Skins

From author's site:

ReactOS® is an advanced free open source operating system providing a ground-up implementation of a Microsoft Windows® XP compatible operating system.

ReactOS aims to achieve complete binary compatibility with both applications and device drivers meant for NT and XP operating systems, by using a similar architecture and providing a complete and equivalent public interface.

ReactOS is the most complete working model of a Windows® like operating system available. Consequently, working programmers will learn a great deal by studying ReactOS source code and even participating in ReactOS development.

ReactOS has and will continue to incorporate features from newer versions and sometimes even define the state of the art in operating system technology.

From author's site:

FreeBSD® is an advanced operating system for x86 compatible (including Pentium® and Athlon™), amd64 compatible (including Opteron™, Athlon™64, and EM64T), UltraSPARC®, IA-64, PC-98 and ARM 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.

From author's site:

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.