This EQ has the best "autogain" of any EQ i've tried, making it excellent for testing out how different frequency boosts or cuts affect the overall tonal balance. Even if you're planning on using other EQs, you could play around with this one first to experiment with which frequencies are the most beneficial to affect.
this freeware semi-parametric EQ has a handful of voices based around the filters and input/output electronics of famous EQs, a mid band with hi or lo Q, high and low abnds that do wide bell or shelf , fully adjustable center frequencies, saturation, input and output trims, a highpas, auto gain balancing to make up or cut any discrepancies from your EQ and a bunch of virtual make-up amp reponses like deep and silky that really effect the sound especially with the saturation engaged. This is not particularly surgical EQ but its more surgical than the vintage console EQs that inspired it. This has vintage vibes and modern convenience, costs NOTHING! I really like to do a little high pass, maybe a little low bell boost, a big lower mids cut and a big air shelf on clean ora coustic guitar and then engage the saturation and fuck with the input and output gain, EQ model and output amp model until I have exactly what I want in the mix shining through, just the specialness of the soloed recording and none of the bullshit that masks the other elements. but this guy is great on anything. Love the slick EQ. I discovered this ages ago but recently saw Dave Pensago hyping it and also saew him hype up MJUC, which you should check out! But seriously? Get this and get their feedback compressor, which is one of the best software compressors ever and it covers a style of compression that is seldom talked about. Both free I might add. I dock this one star from a perfect score because it could really use a low pass too. It woulda been easy to do.
The name says it all, this free EQ plugin is slick, and sounds really nice for mastering. You have control of low, mid, high frequencies. Plus, you can choose from American, British, German, and Soviet EQing styles!