Mac only, so about as much use as a chocolate teapot.
LEQ would make a great addition to Digicheck - the current PP scales are pointless for all broadcast work as it still allows things to get L2'd to death, which is sadly far too common.
EDIT.
Where are these tools then?
I ran a google, and got Mac OSX stuff, and PAS systems.
PAS is useless as the 5.1 has no LEQ, the stereo does (I need it for Dialogue channels though)
plus - worse of all - they are MME drivers only, so useless with RME cards.
(I have the Pinguin Meters, which stopped working when the HDSP went over to WDM model as they are also MME only)