Virtualbox for multiple OSes on your machine

VirtualBox is an x86 virtualization software package, is the third most popular software package for running Windows programs on Linux desktops and vice versa. Originally created by German software company Innotek, now developed by Sun Microsystems as part of its Sun xVM virtualization platform. It is installed on an existing host operating system; within this application, additional guest operating systems, each known as a Guest OS, can be loaded and run, each with its own virtual environment.

Supported host operating systems include Linux, Mac OS X, OS/2 Warp, Windows XP, Windows Vista, Windows 7 and Solaris; there is also an experimental port to FreeBSD.^[1] Supported guest operating systems include a small number of versions of NetBSD and various versions of DragonFlyBSD, FreeBSD, Linux, OpenBSD, OS/2 Warp, Windows, Solaris, Haiku, Syllable, ReactOS and SkyOS.^[2] The latest version also supports Windows 7.

The application can be downloaded via SUN:

http://dlc.sun.com/virtualbox/vboxdownload.html#linux