For a shell music player, I used to love CMus (I still like it a lot), but I've found a similar - probably better - command line music player which is actually a MPD client: Ncmpcpp.Read more »
GMPC, or Gnome Music Player Client is a lightweight client for MPD, extendable through plug-ins: alarm, album view, AWN applet, dynamic playlist, fullscreen info, jamendo, last.fm, libnotify, lirc, lyrdb, lyricsplugin, lyricwiki, magnatune, wikipedia info, taglib (for editing tags) and so on (in the latest version).
Music Player Daemon (MPD) is a flexible, powerful, server-side application for playing music. Through plugins and libraries it can play a variety of sound files while being controlled by its network protocol.
Sonata is a GTK+ music client for the Music Player Daemon (MPD).
Click the read more link for step-by-step setup instructions for both MPD and SonataRead more »
Zeya is a streaming music server that brings your music to any computer with a web browser. It reads your music library, lets you browse your files, and streams them on demand.
The client runs entirely in the browser using the HTML 5 draft standard technologies— no Flash needed! No Silverlight, no applets, no plugins, no external players.Read more »