The 2002 Advent Calendar: Inline::TT
One of the hardest things to do when you're developing scripts is to keep your presentation separate from your programming logic. This is the problem where your script gets intertwined with a hundred or so little print statements and when your manager calls you up and informs you that the output of your program must change, you have to hunt though your code trying to work out what does what. Anyone who's ever tried to do this will tell you just how annoying and time consuming this is.
拙作Inline::TT が去年のPerl Advent Calendar に紹介されてました。