ftp://ftp9.freebsd.org/pub/  direct

[DIR]ubuntu-releases/  direct  70 twin directories
[DIR]slackware/  direct  2218+ twin directories
[DIR]gentoo/  direct  2190+ twin directories
[DIR]debian/  direct  26251+ twin directories
[DIR]OpenBSD/  direct  386+ twin directories
[DIR]FreeBSD/  direct  2032+ twin directories