Tellico is a collection manager for TDE. It includes default collections for
books, bibliographies, comic books, videos, music, coins, stamps, trading
cards, and wines, and also allows custom collections; with unlimited
user-defined fields allowed. Automatically formatted names, sorting by any
property, filters, automatic ISBN validation and full customization for
printing or display through XSLT files are some of the features present. It
can import CSV, RIS, BibTeX, and BibTeXML files; and export CSV, HTML, BibTeX,
BibTeXML, and PilotDB. Tellico can also import data from Amazon, IMDb, CDDB,
or any US-MARC compliant z39.50 server.

The files are stored in XML format, avoiding the need for database server.
It also makes it easy for other softwares to use the Tellico data.