ftp://ftp.swin.edu.au/  direct

[DIR]slackware/  direct  2218+ twin directories
[DIR]sendmail/  direct  8312+ twin directories
[DIR]proftpd/  direct  4023+ twin directories
[DIR]pine/  direct  2975+ twin directories
[DIR]openbsd/  direct  1131+ twin directories
[DIR]netbsd/  direct  2256+ twin directories
[DIR]mozilla/  direct  8643+ twin directories
[DIR]linux/  direct  31577+ twin directories
[DIR]knoppix/  direct  168 twin directories
[DIR]isc/  direct  8078+ twin directories
[DIR]gnu/  direct  4257+ twin directories
[DIR]gentoo-portage/  direct  62 twin directories
[DIR]gentoo/  direct  2190+ twin directories
[DIR]freebsd/  direct  4076+ twin directories
[DIR]fedora/  direct  5109+ twin directories
[DIR]epel/  direct  46 twin directories
[DIR]cwis/  direct  2 twin directories
[DIR]centos/  direct  185 twin directories
[DIR]apache/  direct  24421+ twin directories
[DIR]alpine/  direct  1450+ twin directories
[DIR]sanesecurity/  direct  2 twin directories