JabRef

With XMP support the JabRef team tries to bring the advantages of metadata to the world of reference managers.
Homepage:	http://jabref.sourceforge.net/help/XMPHelp.php

Description

With XMP support the JabRef team tries to bring the advantages of metadata to the world of reference managers. You can now choose to "Write XMP" metadata in the General Tab of JabRef, which will put all the Bibtex information into the PDF. If you then email this PDF to a collegue she can just drag the file into JabRef and all information that you entered will be available to her.