dict_pgsql is a dictionary for the mailer postfix. It is able to get all virtual users out of a postgres database; this is very helpful if you have a large number of users who make updates on their aliases quite often. You don't have to extract all the values into system files; the entries will be fetched directly from the database.
gmmusic is a GNOME database frontend to handle your entire music collection, consisting of songs on CDs,CD- ROMs, MP3s (development tree only), LPs, Singles, Minidiscs, audio, and video tapes. For handling CDs, freedb is fully supported. Besides managing data, it can also print inventory lists and nice trays for CDs and CD-ROMs.
The Information System Development Kit gives the developer a platform-independent method of creating Information Systems with data forms, SQL database access, database-browsing support, report generator and many other useful features. ISDK is now in a development stage and it is available only for the Linux operating system. The form module now works on text terminals using the ncurses library (not functional right now), and on the X-Window system using the GTK+ toolkit.
JReferences is a program written in Java for managing bibliographic references in the BibTeXML format. Storage is done in a binary file database or, optionally, in a MySQL database. A PHP Web frontend is available. It can input BibTex, RIS, BibTeXML, and DocBook formated references.