Tellico - Tellico is a KDE application for organizing your collections.
DiskCatalogMaker - Simple, smart and fast disc management tool.
Gamepedia - Gamepedia is a game cataloging application for everyone running Mac OS X.
Virtual Volumes View - VVV uses a relational database to store its data.
Delicious Library - Delicious Library 3: Catalog your books, movies, music, software, toys, tools, electronics, & video games. Archive your life.
abeMeda - abeMeda is a powerful and very fast disk cataloging tool, reading metadata like EXIF, IPTC, JPG, TIFF, MP3, AAC (iTunes)