Free plugin
APU Lodness Meter v1.2.2 for Windows and macOS
https://apu.software/meter/
Video using the plugin
https://apu.software/media/demo-meter.mp4
At present, the meters in the mixing console can be set to display Peak, RMS or both. I think, along with them, we need LUFS/LKFS and True Peak as well.
That would really help us mix projects according to standards like EBU R128 or ATSC.