The 'Key Tracking EQ Vibrator' is a vibrato/tremolo type of effect that vibrates the input note frequency and it's octaves.
The 'Note Tracking Frequency Follower EQ' is a signal following EQ that adjusts the volume of the input note frequency based on the signal volume.
These two ddofers has some quirks, the biggest problem is that they do not reset the note frequency volumes at note change. They aren't very CPU friendly, but i think you understand why when you expand the doofers, they are huge. They are monophonic, can't manipulate more than 1 note at any given time.
I also added the previously uploaded 96 Band EQ doofer and 12 doofers that is basically an EQ tuned to 8 notes each.
PS: The notes are 1 octave higher in Renoise, so a C3 is a Renoise C4. This is due to the fact that i didn't realise that it is not the same in all apps.
Each doofer can be downloaded on it's own or you can use the library file to install all the doofers into a new library.
Short demo: