FreeBSD 6.X-STABLE continues incremental feature, performance, stability development. FreeBSD 6.1 (May, 2006) FreeBSD 6.2 (January, 2007) FreeBSD 7.X-STABLE is the newest stable branch with lots of interesting experimental features. FreeBSD 7.0 (January, 2008) FreeBSD 8.X-CURRENT continues high risk development.