in reply to poll ideas quest 2011
Though not strictly a module, more a pragma, use strict; is still by far my favorite :).
DBI (you should make all modules link to CPAN), is mostly hidden behind some other module in our development environment. So next to strict, in order of favorite-ness, that would be warnings, Getopt::Long, Data::Peek, Text::CSV_XS, DBI, DBD::Pg, DBD::SQLite, DBD::Unify, DBD::CSV, autodie (likely to rise in this order), JSON, WWW::Mechanize, HTML::TreeBuilder, XML::Simple to name just a few.
My fellow monks
Can't tell (I'm NSA/FBI/HS/...)
Others (explain your deviation)
Results (163 votes). Check out past polls.