Free BSD 8.0 i386 CD gives you Xen Dom-U, VirtualBox guest and host, hierarchal jails; NFSv3 GSSAPI support, experimental NFSv4 client and server; 802.11s D3.03 wireless mesh networking and Virtual Access Point support; ZFS no longer in experimental status; ground-up rewrite of USB, including USB target support; continued SMP scalability improvements in many areas, especially VFS; revised network link layer subsystem; experimental MIPS architecture support etc..

Free BSD

FreeBSD is a free Unix-like operating system descended from AT&T UNIX via the Berkeley Software Distribution (BSD). It has been characterized as "the unknown giant among free operating systems". It is not a clone of UNIX, but works like UNIX, with UNIX-compliant internals and system APIs. FreeBSD is generally regarded as reliable and robust.

It has the kernel, device drivers and all of the user land utilities, such as the shell, are held in the same source code revision tracking tree, whereas with Linux distributions, the kernel, user land utilities and applications are developed separately, then packaged together in various ways by others.