ftp://ftp.swin.edu.au/  direct

[DIR]slackware/  direct  2092+ twin directories
[DIR]sendmail/  direct  7793+ twin directories
[DIR]proftpd/  direct  3754+ twin directories
[DIR]pine/  direct  2761+ twin directories
[DIR]openbsd/  direct  1041+ twin directories
[DIR]netbsd/  direct  1975+ twin directories
[DIR]mozilla/  direct  7564+ twin directories
[DIR]linux/  direct  27733+ twin directories
[DIR]knoppix/  direct  165 twin directories
[DIR]isc/  direct  7192+ twin directories
[DIR]gnu/  direct  3945+ twin directories
[DIR]gentoo-portage/  direct  51 twin directories
[DIR]gentoo/  direct  2080+ twin directories
[DIR]freebsd/  direct  3749+ twin directories
[DIR]fedora/  direct  4633+ twin directories
[DIR]epel/  direct  44 twin directories
[DIR]cwis/  direct  2 twin directories
[DIR]centos/  direct  171 twin directories
[DIR]apache/  direct  23777+ twin directories
[DIR]alpine/  direct  1219+ twin directories