CDpedia
OS X application that lets you manage and catalogue your CD collection.
5 Alternatives To CDpedia
DVD Hunter
DVD Hunter is a free application for Mac to catalog, sort, and organize your movie collection.
DVDPedia
DVDpedia is a movie cataloging application for Mac OS X.
Gamepedia
Gamepedia is a game cataloging application for everyone running Mac OS X.
Tellico
Tellico is a KDE application for organizing your collections.
fennel DVDManager
fennel DVDManager (aka fsDM) is our next-generation DVD manager (sic) for Mac OS X.