Libwww-perl is a collection of Perl modules which provides
       a simple and consistent programming interface (API) to the
       World-Wide Web.  The main focus of the library is to
       provide classes and functions that allow you to write WWW
       clients, thus libwww-perl said to be a WWW client library.
       The library also contain modules that are of more general
       use.                                          

       The main architecture of the library is object oriented.
       The user agent, requests sent and responses received from
       the WWW server are all represented by objects.  This makes
       a simple and powerful interface to these services.  The
       interface should be easy to extend and customize for your
       needs.                               

http://www.linpro.no/lwp/