SPL Hawkeye by Plugin Alliance - Metering Plugin VST VST3 Audio Unit AAX
Decibel Meter Digital Sound Level Meter (30-130dB),AP-882A Noise Level Meter Tester with LCD Backlight/Max Hold,/Sensitivity Adjustment and dB A/C Switch(Battery Included) (AP-882A-US) : Amazon.ca: Industrial & Scientific
HSM - A word on sound level meter apps
Decibel - Loudness Metering Plugin - 30 Days Trial
The Perfect Monitoring Levels For Your Home Studio – Mastering The Mix
spl modules – Studio Six Digital
UT352 Sound Level Meter - UNI-T Meters | Test & Measurement Tools and Solutions
Integrating Sound Level Meter Type6226 - TECHNO VIETNAM