Visual EQ?

Is there a spectrum analysis and EQ tool all in one. i.e. something that lets you see the frequencies change on a bar chart as you adjust the controls? Thanks - rev

GlissEQ is a good one. Fabfilter Pro-Q is even better. Much better, in fact. If you like pictures (I know I do!), Pro-Q gives you the option of viewing pre-EQ, post-EQ or both at once.