對于VMWare、Virtual PC這些虛擬機軟件，可能大家都比較熟悉。VirtualBox是德國一家軟件公司InnoTek所開發的虛擬系統軟件，它不僅具有豐富的特色，而且性能也很優異。更是開源的，成為了一個發布在GPL許可之下的自由軟件。
VirtualBox 可以在 Linux 和 Windows 主機中運行，并支持在其中安裝 Windows (NT 4.0、2000、XP、Server 2003、Vista)、DOS/Windows 3.x、Linux (2.4 和 2.6)、OpenBSD 等系列的客戶操作系統。假如你曾經有用過虛擬機軟件的經歷的話，相信使用 VirtualBox 不在話下。即便你是一個新手，也沒有關系。VirtualBox 提供了詳細的文檔，可以助你在短期內入門。
VirtualBox is a family of powerful x86 virtualization products for enterprise as well as home use. Not only is VirtualBox an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License (GPL). See "About VirtualBox" for an introduction. VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software.
下載地址(Windows 32位)：http://download.virtualbox.org/virtualbox/2.1.4/VirtualBox-2.1.4-42893-Win_x86.msi
下載地址(Windows 64位)：http://download.virtualbox.org/virtualbox/2.1.4/VirtualBox-2.1.4-42893-Win_amd64.msi
下載地址(Mac OS X)：http://download.virtualbox.org/virtualbox/2.1.4/VirtualBox-2.1.4-42893-OSX.dmg