Buy: Perl by Example by Ellie Quigley
KingCode's recommended book title for learning Perl. Imagine learning Perl without even having to be on a computer! It's just that good of a book.
Perl.com
The central web site for the Perl community.
Parsing XML with Perl
A really good place to get information on how to parse through XML documents with several parsing modules.
CPAN
Comprehensive Perl Archive Network - the place to get Perl modules so you do not have to re-invent wheels.
Regular Expression Man Page
Just when you thought you mastered regular expressions, you find yourself digging for the reg-ex cheat sheet.
Intro to Perl by Jukka Korpela
Still wondering what Perl is? Or do you want to get back to the basic fundamentals of Perl? This page is for you.
Freecode.com - Perl code examples
Sometimes, the best way to learn is by example. Freecode has a fantastic resource of Perl programs, from basic CGIs, form-mail handlers, to chat programs and graphics tools.
perlWWW - Web applications and libraries
Earl Hood's attempt to index free Perl programs and libraries related to the Web.