The QTads distribution doesn't contain games, but fear not! There's a large repository of IF-related stuff (with lots of games!) called The Interactive Fiction Archive.

Since the archive is actually “just” a (huge) bunch of data thrown together (more or less), a nice fellow has created a site that will guide you through the archive: Baf's Guide to the IF Archive. It contains many cool things, like a “Genre Map” for the games located in the archive along with descriptions, reviews and ratings, links, and other useful things. Make sure to check it out!

Another similar, newer (and perhaps better organized) site is the Interactive Fiction Database (“IFDB”, for short). The Interactive Fiction Database is an IF game catalog and recommendation engine. IFDB is a Wiki-style community project: members can add new game listings, write reviews, exchange game recommendations, and more. Pretty much a must-visit.