menu_buddy is a small python script used to produce GNOME panel menus out of a directory hierarchy of music files. The menus created by menu_buddy are able to enqueue/play directories (or whole subtrees) in xmms as well as pause/play/skip xmms itself.
gmocp (gnome moc player) is a gtk-based frontend for the moc player (music on console). It allows to you to play, pause, next, previouse, toggle shuffle, toggle repeat and control the playlist elements.