FreeBSD is a Open source UNIX operating system maintained by the FreeBSD community (http://www.freebsd.org). FreeBSD provides many new features which are provided by some and yet to be implemented in other leading Operating Systems. Earlier, FreeBSD was considered only for servers due to the need of keeping servers stable, secure, less maintenance etc. But now, it is being used even for desktops. Harvey Allen, Brian Candler, and Joel Jaeggli explains why did they opt for FreeBSD here (pdf). Some key points in it: * WhyFreeBSD in general? * Why FreeBSD rather than Linux? * Why FreeBSD rather than Windows?