XPLSISNJASP (what a great name right?) is XMMS Visualization plugin. It is a LightShow via Parallel Port, but you can plug in your favourite electronic disasters (toasters, TVs, etc..) and let all jump and roast in rhythm of XMMS! ;-).
EasyTAG is a utility for viewing and editing tags for MP3, MP2, MP4/AAC, FLAC, Ogg Vorbis, MusePack, Monkey's Audio and WavPack files. Its simple and nice GTK+ interface makes tagging easier under GNU/Linux or Windows.