from freshmeat: "RefDB [1] is a reference database and bibliography tool for DocBook SGML and XML documents. This is an attempt to provide most of the functionality of commercial packages like Reference Manager or EndNote in a platform-independent tool, targeting DocBook rather than word processors." This version's changes include bugfixes, build improvements, better error reporting and output.
Links:
[1] http://refdb.sourceforge.net/index.html