PerlMonks? ​http://perlmonks.org One of the biggest Perl community sites

PrePAN ​http://prepan.org Social reviewing for Perl Modules

MetaCPAN ​http://metacpan.org A modern CPAN search engine

​http://search.cpan.org The old and official CPAN search engine

StackOverflow? Perl Questions ​http://stackoverflow.com/questions/tagged/perl