What are some alternatives?
When comparing GCstar and Numento, you can also consider the following products
Data Crow - Data Crow is the ultimate media cataloger and media organiser.
Delicious Library - Delicious Library 3: Catalog your books, movies, music, software, toys, tools, electronics, & video games. Archive your life.
Tellico - Tellico is a KDE application for organizing your collections.
Ant Movie Catalog - Ant Movie Catalog is a free, open-source program made to manage your collection of movies on DVD...
tinyMediaManager - A multi OS media manager written in Java/Swing
Griffith - Griffith is a media collection manager application.