Blue Cat's FreqAnalyst - VST 1.2

Free

It allows you to monitor the spectral content of your audio signal in real time.

It is a 0 dB stereo brickwall limiter with adjustable dynamics response.

Blue Cat's StereoScope Pro VST is a real time stereo field analyzer.

It is a powerful multiple tracks real time waveform renderer and comparator.

Blue Cat's Protector is a 0 dB stereo brickwall limiter.