RefDB is a free and portable reference and notes database toolkit as well as a bibliography application that serves a similar purpose for SGML, XML, and LaTeX documents like Reference Manager or EndNote do for word processor documents. The bibliography part is something like bibtex for markup languages. RefDB consists of an application server which interacts with a relational database on the server side and a variety of clients on the workstation side. There is a choice of command line clients, web interfaces, editor interfaces, and language bindings that allow you to work with your reference data any way you want.