sndpeek - a real-time audio visualization tool (animated, 3D)
TAPESTREA - TAPESTREA is a unified framework for interactively analyzing, transforming, and synthesizing complex sounds.
Youlean Loudness Meter - Find your audio's true perceived loudness to prepare for TV and streaming services.
LoudLab - LoudLAB is an audio application designed to Monitoring & Control loudness levels.
Digital Level Meter - Display sound level
Colibri Lossless - A native audio player for macOS built from scratch using the award-winning BASS audio engine.