Leftover Lasagne Pushtec 5+1A, Free
This Windows-only plug-in looks very much like the Pultec EQP-1S, an extended version of Pultec's legendary EQP-1A3, possibly two of the most sought-after (and costly) EQs on the vintage market.
The Pushtec provides five bands, all of them adjustable. It may not make your track sound like it was mixed at the Power Station, but it will do a fine job and look darn good doing it!
Find out more about the Leftover Lasagne Pushtec 5+1A
Linux DSP CH-EQ Parametric, £10
Another EQ that looks for all the world like an old Pultec - this one, however, is strictly for the Linux crowd.
In any event, this little fella sounds every bit as good as it looks. You get low, high and a pair of mid-frequency knobs (one for gain, the other for frequency selection), and you can adjust the bandwidth of the mids.
Very nice, and the price is certainly right.
Find out more about the Linux DSP CH-EQ
BIAS Repli-Q, $149
This gem from BIAS is a 'smart' equaliser, meaning it can analyse the spectral character of one recording and apply it to another.
This allows you to match your overall sound to that of your favourite recordings, but more importantly, it allows you to learn how they differ and to adjust your recordings accordingly. You can save your spectrums for later use, as well.
Find out more about BIAS Repli-Q
DDMF IIEQ, Free
IIEQ looks like a graphic EQ with knobs, but it's actually a parametric affair with a full ten bands, the first and tenth of which are shelving.
The shelves have gain and cutoff frequency knobs, while the remaining eight are peaking filters with gain, centre frequency and Q controls. There are VU meters to keep you out of trouble, and with +/-20dB of gain on offer, you might need 'em!
Find out more about DDMF IIEQ