A VST and AudioUnit plugin to measure the loudness, according to ITU BS.1770 and EBU R128.
Official website: http://www.lufsmeter.com
Author: Samuel Gaehwiler (www.klangfreund.com)
The excellent JUCE framework (http://www.juce.com) is used extensively (included in the sources).
You have to obtain a copy of the VST SDK by Steinberg (It's not allowed to redistribute it,
but you get it for free).
Search for vst_sdk2_4_rev2.zip on http://www.steinberg.net/en/company/developer.html and copy
the pluginterfaces and public.sdk folders into the vstsdk2.4 directory.