Compatible with a large number of 32 & 64-bit Operating Systems.Extends the ability of existing system to run multiple Operating Systems in virtual environment.Here are some Key Features of VirtualBox:

Some of the home based uses of VirtualBox are to run Windows on Mac or Linux for Free, and run Linux on Windows for free. Plus, it supports a large number of guest operating systems, like Windows (Windows7, Vista, Server 2003, XP, 2000, NT 4.0, Linux (2.6 and 2.4), DOS/Windows 3.x, OpenSolaris and Solaris, and OpenBSD. VirtualBox runs on Windows, Macintosh, Linux, and OpenSolaris hosts. This ensures that it always meet professional quality criteria. It’s a high performance product for business enterprises and is packed with features. VirtualBox is dedicatedly supported by Sun Microsystems. VirtualBox is a powerful virtualization ( x86) product for enterprise and home use. It can be used as a completely free replacement for the popular virtualization software VMWare. VirtualBox is an Open Source Free Virtualization software.

Download virtualbox from sun for free