EQ 550 Proportional Equalizer.
I have no idea if this is any good. All I know is that it is free
From the Over Loud Audio Tools page:
" EQ550 simulates a legendary Proportional-Q custom opamp equalizer, beyond the original hardware. "
It goes on:
Hyper-realistic simulation of the original Proportional Q equalizer, thanks to the 4th generation DSP technology
5 bands eq: 2 shelving/peaking, 2 peaking, 1 high cut, 1 bandpass
Individual band Cue
Continuous frequency selection
Simulation of all transformers in the original unit
Low CPU usage: more than 1500 instances on a Macbook Pro Retina
Multilevel undo-redo
A/B Comparison
Lots of presets designed in real mixing sessions
If you have a DAW that uses plug ins maybe this is great! Take a look and see if it is for you. Or take a look and add to this thread and explain it better than I have.