This plugin has a oscilloscope, spectrum analyser, VU meter and a spectrum meter.
The spectrum meter shows the highest value of the spectrum analyser.
There is a popup menu, so when you press with the right mouse button on the plugin, you can change some settings.
ps: this is my first plugin, and my first dll I've made in C++, so don't expect too mutch.
This displayed what it said it would do however the contents did not scale to the size of the window (which is natively skinned unlike a number of other vis plugins so that's one plus) and the menu options didn't always seem to work correctly as expected at times. For a start at coding it's not that bad.