TagSpaces - TagSpaces is an open source platform for personal data management. With TagSpaces you can manage and organize the files on your laptop, tablet or smart phone.
Ant Movie Catalog - Ant Movie Catalog is a free, open-source program made to manage your collection of movies on DVD...
TagFlow - TagFlow is an intelligent files manager that use tags for organize your documents.
Tellico - Tellico is a KDE application for organizing your collections.
Tabbles - Tabbles use tags to organize and find files along with your colleagues.
calibre - Ebook manager, viewer & converter