University Scholarly Knowledge Inventory System (U-SKIS) was developed at the University of Utah. It tracks .pdf files, records communication, and stores publisher's archiving policies to determine what may be added to institutional repositories.
This software is a Perl Catalyst based electronic lab notebook (ELN) aiming for small biologic laboratories, that have no funding to invest into a closed source ELN.
Perl cgi (with ajax interface) which scans your pdf library for embedded metainformation, allows you to edit this information and to keep it in sync with your bibliographic database (currently the format used by bibus).