What is a good "analyzer" you'd recommend (like Plugin Doctor only a VST) ?

[MasterTuner]

I'm writing a plugin, and I'd find it useful to compare my input signal before my plugin to the output signal after my plugins processing. How my plugin is, for example, compressing the signal, adding saturation harmonics etc.

Plugin Doctor looks very good, but is standalone - I'd like a VST that I can plugin to my DAW.

Any suggestions? (I know about Melda's analyzer)

[Zaehler]

IIRC, Plugin Doctor is also available as a plugin since the last update.

[Debutante]

Download links in the description... and free too.