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.
DiskCatalogMaker - Simple, smart and fast disc management tool.
allTags - allTags is a free, tag based file management application.
Virtual Volumes View - VVV uses a relational database to store its data.
Elyse - The free version allows up to 30 tags.
abeMeda - abeMeda is a powerful and very fast disk cataloging tool, reading metadata like EXIF, IPTC, JPG, TIFF, MP3, AAC (iTunes)