dpMeterXT is a loudness metering plugin and application fully compliant with the EBU R128, ITU-R BS.1770/1771, ATSC A/85 and several other regionspecific loudness standards.
dPMeterXT supports multiple channel configurations, from 1.0 up to 9.1/10.0, depending on your system configuration or DAW capabilities.EBUR128. It features large readouts, meters, graphs, measurement history and datalogging. With dpMeterXT, you can define the measurement parameters in a very detailed way (i.a. integration time, gating levels, filter).

Home page - http://www.tb-software.com/TBProAudio/dpmeterxt.html