Ant Movie Catalog - Ant Movie Catalog is a free, open-source program made to manage your collection of movies on DVD...
Microsoft Office Access - Access is now much more than a way to create desktop databases. It’s an easy-to-use tool for quickly creating browser-based database applications.
Tellico - Tellico is a KDE application for organizing your collections.
My Visual Database - Using My Visual Database, you can create databases for invoicing, inventory, CRM, or any specific purpose.
calibre - Ebook manager, viewer & converter
MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.