Alexandria is a program for organising collections of books. it

* retrieves and displays book information (including cover pictures) from
several online libraries, such as amazon, proxis and barnes and noble
* allows books to be added and updated by hand
* enables searches either by ean/isbn, title, authors or keyword
* can import and export data into onix, tellico and isbn-list formats
* features a hig-compliant user interface
* handles book rating and notes
* supports cuecat barcode readers
website: http://alexandria.rubyforge.org/