http://turbulence.org/Works/mystery/games.php
Some of you may have played Mystery House. Basically, it's the game that start Sierra, in a sense - the first game by Ken and Roberta Williams. Very old now, dreadful parser, and so on.
Well, in this page there are a few "retakes" of Mystery House - Adam Cadre, Emily Short, Michael Gentry and more, all big names in the IF community. I highly reccommend them. Espceially if you've played the original Mystery House. And if you haven't, no worries, it's there too. :)