Youlean Loudness Meter - Find your audio's true perceived loudness to prepare for TV and streaming services.
sndpeek - a real-time audio visualization tool (animated, 3D)
Zelscope - Zelscope is a Windows software that converts your PC into a dual-trace storage oscilloscope and...
Spectralissime - Spectralissime High Definition Spectrum Analyzer by V.Burel
Digital Level Meter - Display sound level
Visual Analyser - A powerful software implementing a Spectrum Analyzer, Oscilloscope, Frequency meter, Distorsiometer, Volt meter and more... plus complete D/A conversion, ZRLC, Impedance meter