Blue Cat's Oscilloscope Multi for Mac OS X 1.7

The Blue Cat's Oscilloscope Multi was designed to be a unique several tracks real-time waveform renderer and comparator: it will let you visualize the content of multiple audio tracks on the same screen, then compare them using its X-Y view

Blue Cat's FreqAnalyst Pro for Mac OS X 1.94

Blue Cat's FreqAnalyst Pro is a real time spectrum analyzer with advanced functionalities. It uses the same smooth algorithms as its little brother (Blue Cat's FreqAnalyst free plug-in): it has been designed to provide extreme smoothness and high resolution for both time and frequency