Gnook is a free GUI application to manage your personnal book's collection. It is written in python and distributed for debian based and windows systems.
Automatically retrieve information for books using google books and/or isbndb.
A simple app that builds a library of your music, then fetches information from metal-archives, discogs, etc. and shows you what you're still missing (e.g. new releases). Moved to http://github.com/KenjiTakahashi/gayeogi