CDFinderCDFinder even catalogs files inside .zip, .sit and .sitx archives, and collects metadata from images and MP3s. Retrieving a file is intuitive: when you find a needed file in the catalog, simply drag it to your desktop and CDFinder will prompt you for the appropriate original disc.

You can print catalogs and disc labels and inserts, export a catalog to HTML for a Web page, or to tabbed text for importing into a database; share a catalog over a network, control it with AppleScripts, and import catalogs from other disk-cataloging programs.

It costs $39 and is worth every penny if you keep track of lots of archive discs. CDFinder is for Macs only, but they also have a CDWinder for Windows.