projectM takes you flying through the soundwaves you're hearing
projectM is an awesome music visualiser. There is nothing better in the world of Unix. projectM's greatness comes from the hard work of the community. Users like you can create presets that connect music with incredible visuals. Try it!
projectM Visualisation is an LGPL'ed reimplementation of Milkdrop under OpenGL
All projectM requires is a video card with 3D acceleration and your favourite music.