It's still an offline scanner. It's just that now you can run it easily from inside Foobar2000. It's much faster than real-time, so that's a plus.
This is weird - it looks like every post I've made in the past 3 days has disappeared. Something to do with the forum being down, maybe. At least, I don't
think I've pissed anyone off that bad over in Boston...
Anyhow, yes in addition to the offline version there is also a VST version but it seems to be hard to find now. The offline version is great because you can scan a whole folder at once and get a summary report in a text file. But I use the VST version much more often, and it's included in my standard template as the last thing on the master.
Also check out Jaeroen Beebaart's
EBU Loudness Meter. Here's an overview of the
EBU R 128 standard, which is a loudness standard for broadcasting. Beware, though: it's a CPU-muncher if you try to insert it into multiple tracks. I tried that because it's said to be useful for volume matching and I wanted to see if I could match a multi-part vocal up - didn't work too well for that, though.