Perl

Perl: 2008 Perl Advent Calendar: Running in a filtered wonderland

Catalyst: Catalyst Advent Calendar - Day 8

JPerl: ワンライナーで画像収集

PHP

PHPadvent: Web Advent 2008

SysAdvent

Advent Calendar for System Administrators home page: SysAdvent

WEBKRAUTS

WEBKRAUTS: Adventskalender 2008 - Webkrauts

Interesting Things

Hubble Telescope

Hubble Space Telescope: Hubble Space Telescope Advent Calendar 2008 - Photos - The Big Picture - Boston.com