ftp://ftp.ecc.u-tokyo.ac.jp/mirror/ftp1.debian.or.jp/debian/pool/main/libz/  direct

[DIR]libzip/  direct  620+ twin directories
[DIR]libzip-ruby/  direct  380+ twin directories
[DIR]libzlib-ruby/  direct  370+ twin directories
[DIR]libzorpll/  direct  330+ twin directories
[DIR]libzrtpcpp/  direct  450+ twin directories
[DIR]libzn-poly/  direct  185 twin directories
[DIR]libzvt/  direct  800+ twin directories