<li><a href="http://www.perl.com/CPAN/modules/by-module/Net">libnet</a>
<li><a href="http://www.perl.com/CPAN/modules/by-module/LWP/">libwww-perl</a>
<li><a href="http://www.perl.com/CPAN/modules/by-module/Business/">Business-CreditCard</a>
<li><a href="http://www.perl.com/CPAN/modules/by-module/Net">libnet</a>
<li><a href="http://www.perl.com/CPAN/modules/by-module/LWP/">libwww-perl</a>
<li><a href="http://www.perl.com/CPAN/modules/by-module/Business/">Business-CreditCard</a>