libcompress-zlib-perl 2.015-1 (amd64 binary) in ubuntu karmic

 Compress::Zlib is a Perl external module which provides an interface to
 the info-zip zlib compression library. zlib is a general purpose
 compression library.
 .
 Some of the features provided by Compress::Zlib include:
 .
    * in-memory compression and decompression
    * read and write gzip (.gz) files directly.
 .
 See also: libio-compress-zlib-perl