Windows

Prey is a silent tracking program that you can install on your computer. If your computer goes missing, you can log in to their website to help track it down when it reconnects to the Internet.

Nmap is a security scanner tool that can check for open ports on your computer or other computers on your network.

RockMelt is a Chromium-based web browser that integrates social media systems, such as Facebook and Twitter.

Fontster displays all of the fonts installed on your computer.

Pegtop PStart is a portable program launcher for your USB drive.

WinPenPack is a portable program launcher for your USB drive. There are several preloaded program combinations to choose from.

PortableApps is an open source program launcher for your USB drive. It allows you to "install" portable versions of several popular programs, including Open Office and Mozilla Firefox. They can then be used on any computer with a USB port.

Novo Builder allows you to create your own Ubuntu distribution customized however you like.

UNetbootin is an alternative way to install different Linux distriubutions. It allows you to run the installation program off of a USB drive instead of a CD.

VirtualBox is the best free virtualization solution. VirtualBox allows you to create virtual machines on your computer. This allows you to run another operating system within your native system.