Delicious Library - Delicious Library 3: Catalog your books, movies, music, software, toys, tools, electronics, & video games. Archive your life.
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.
Readerware Book Database - The easiest, fastest way to catalog your books, nothing else comes close.
MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.