TBPro Audio

AB_LM is a a gain control which enables level matched and sample accurate A/B comparison of FX chains.
- how to:
http://www.learndigitalaudio.com/ab-level-matching-tutorial-using-free-plug-ins


sTilt is a linear phase filter which tilts the audio spectrum around a given center frequency.

gEQ12 is a 12 band stereo/MS graphic equalizer with accurate spectrum analyzer and minimum/linear phase modes.

dpMeter is a precise digital audio multi channel meter including RMS, EBUR128 and TruePeak measurement.

LA xLimit is an advanced look ahead, wideband linked-stereo limiter including ISP (inter sample peak) detection and oversampling.

etc...

http://www.tb-software.com/TBProAudio/products.html