Some technical Internet resources I use (subjects in alphabetical order):
CVS
Open Source development with CVS (online book)
Perl
Rex Swain's Perl5 reference
Perl Monks
CPAN (the Comprehensive Perl Archive Network)
Perl.com (O'Reilly-perl)
Use Perl.org
Class::DBI
Template Toolkit
PHP
PHP Manual
SQLite
SQLite Homepage