Digital Level Meter - Display sound level
Boson Audio Editor - Boson is an audio editor/recorder for Mac OS X.
AudioTool - Whether you want to make music for the club, or you're aiming to put a few tracks to a film, Audiotool is a website geared towards putting the mixes at your fingertips. Read more about AudioTool.
TAPESTREA - TAPESTREA is a unified framework for interactively analyzing, transforming, and synthesizing complex sounds.
Sound Meter - Professional sound level meter in your pocket! Features: ------- ¦ direct reading in dB
Colibri Lossless - A native audio player for macOS built from scratch using the award-winning BASS audio engine.