The Perl advent calenders have a pretty long tradition and are mostly about tinkering with the language, presenting new modules etc. Often with a christmas/Sant

The Perl advent calenders have a pretty long tradition and are mostly about tinkering with the language, presenting new modules etc. Often with a christmas/Santa theme. In other words, they're about "hacking"... They also server as a decent health check (e.g. Catalyst seems pretty much dead), but aren't really about advertising.