bibfilex

Bibfilex is a free bibliographic manager for Mac OS users. It's useful to create and manage archives of bibliographical items (books, articles, etc.) with possible attachments of any kind according to Biblatex structure and rules.

The program can import the content of a file in Biblatex format, export data in a Biblatex file, filter the items, check for double items in the file in use, and more.