dr analyzer

DRAnalyzer is a VST spectrum analyzer that can analyze the dynamic range for each band. Although the normal spectrum analyzer can display only the instantaneous value of the spectrum, DRAnalyzer can display the past spectrums as a distribution. Since it is possible to see the dynamic range for each band from the distribution, compatibility with multiband compressors is outstanding. You can optionally correct the spectrum according to the human auditory characteristics, so you can see the sound as it is heard.

https://bakuage.com/en/vst/

Spectrum Analyser

Plugin Developer BEN/SCHULZ has released a free multichannel spectrum analyser named Spectrum.

The spectra can be displayed in realtime or as a spectrogram and supports all the features one would expect from an audio spectrum analyser.

The free version features up to four channels. An upgrade to sixteen channels is available as well.

https://schulz.audio/products/spectrum/

SIR spectrum analyzer

SpectrumAnalyzer is a state-of-the-art spectrum analyzer plugin, which offers a lot of opportunities to display the spectral content of your audio material and helps you create a better mix this way. SpectrumAnalyzer comes in two editions, a free and a full version.
SpectrumAnalyzer uses modern and reliable technics to analyze your audio material. It has a FFT (Fast-Fourier-Transform) and an analog-style (parallel band-pass IIR filter) engine, both of which can run simultaneously. So you can benefit from the more accurate time resolution of the band-pass filters and the better frequency resolution of the FFT at the same time. Check out the cool intelligent peak-detection, which automatically detects resonant frequency peaks in the signal. Use the snapshot function to easily save the current state of your analyzer, so you can compare the spectral profile of your current project with other songs. SpectrumAnalyzer also includes a VU-Meter (with peak and RMS measurement) and a Stereo Correlation Meter.

http://www.siraudiotools.com/Spectrum-Analyzer.php

Seven Phases Spectrum Analyzer

Seven Phases Spectrum Analyzer is a real-time spectrum analysis VST plugin. The idea was to create an old-fashioned tool reminiscent of classic hardware analyzers of the earlier centuries. Unlike most of other analyzers available these days, this plugin is not FFT-based but utilizes a filter-bank algorithms that mould its unique pros and cons.

https://sevenphases.wordpress.com/spectrum-analyzer/

MEQ-10

MEQ-10 it´s a 10 band equaliser with -12/+12dB on gain performance and 2 octaves bandwidth control, featuring 5 filter modes.

This plugin has a frequency analyser spectrum view that can be maximized featuring several options.

By using the maximized window of the frequency analiser, the user can toogle from a full mode, with both Left and Right spectrums, to just full/Left or full/Right, plus a split viewing where the window splits for both L/R spectrums.

MEQ-10 works as a SEND effect wich means it works as an Auxiliary in an hardware mixer receiving audio from any channel.

http://www.beatassist.eu/meq-10/

N6 EQ - RAZ

RAZ Audio has released N6 Paragraphic Equalizer, a freeware zero latency high precision equalizer effect in VST plugin format for Windows.

The neat thing about this equalizer is that it comes with a built-in spectrum analyzer. We don’t see that happen too often in the freeware EQ domain. The analyzer can work both pre and post EQ, which is incredibly useful when mixing in a poor room.

http://www.razaudio.com/eq.html