Time::Hires would be useful (if not already included). It works on VMS. I've not tested the following, but I think they would be very useful if they work:
CPAN of course. The various HTML parser modules - I think LWP already include HTML::Parser, but not HTML::Tree and HTML::TreeBuilder etc. Archive::Zip -- The opinions expressed herein are my own, and are not necessarily endorsed by my employer ...
