VirtualBox - a free program for creating virtual machines. Having tried a lot of paid counterparts, I decided to stop on this free program. She knows how to virtualize a pseudo-computers based on Windows (NT 4.0, 2000, XP, Server 2003, Vista), DOS / Windows 3.x, Linux (2.4 and 2.6), and OpenBSD.
Create a virtual machine does differ from these fellows will not: have to boot from physical drives, support for disk images as drives, real support for USB and network cards, dynamic and static allocation of space for emulation of logical partitions, remote connectivity support, and more more. There are versions for Windows (x86 and AMD64), OS X (Beta 2; Intel Macs only), all kinds of Linux (Ubuntu, Debian, SuSe, Fedora, Mandriva, Red Hat, Xandros). Supports multiple languages (Russian present), is distributed in two versions: for personal and commercial use. Open source makes a free program for personal use.
During testing, was found one drawback - the program does not work in Windows XP, but in Vista installs and runs without problems. In general, the program is liked for its simplicity, elegance and speed of work (I work faster than VMware),
try.