Ant Movie Catalog - Ant Movie Catalog is a free, open-source program made to manage your collection of movies on DVD...
calibre - Ebook manager, viewer & converter
Tellico - Tellico is a KDE application for organizing your collections.
tinyMediaManager - A multi OS media manager written in Java/Swing
Delicious Library - Delicious Library 3: Catalog your books, movies, music, software, toys, tools, electronics, & video games. Archive your life.
Numento - With Numento, you will be able to efficiently and easily manage your collection.