PerlLanguage patterns, especially GangOfFour DesignPatterns in Perl. Take a look at ''PerlDesignPatterns'', a free online book and wiki: *** http://perldesignpatterns.com/?PerlDesignPatterns On c2 Wiki: * PerlSingleton * Lists of sites: *** http://www.google.com/search?q=%22patterns+in+perl%22 *** http://www.google.com/search?q=perl+design+patterns