NP3 Music Player is a standalone music player, which has a distinct separation between client and server. It consists of a daemon, which plays the files (through XMMS input plugins), and is controlled by a client. It features an event system, which enables excellent support for sophisticated clients.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.