ftp://ftp.uni-kassel.de/Mirrors/archive.ubuntu.com/ubuntu/pool/universe/libz/  direct

[DIR]libzip/  direct  510+ twin directories
[DIR]libzip-ruby/  direct  340+ twin directories
[DIR]libzlib-ruby/  direct  330+ twin directories
[DIR]libzrtpcpp/  direct  400+ twin directories
[DIR]libzvt/  direct  700+ twin directories
[DIR]libzorpll/  direct  300+ twin directories