Webnauts,
You introduced me to this tool some time ago. Without sounding like a homer. It is the best tool I have run across, very complete. And handles one, two and three word key phrases, and tells you the density. It does very good on the metatags (though I do wish it would be able to catch more spam issues (like duplications)
When used in concert with other tools (link checkers..html validators et al) it is a important part of my
SEO work
Edit Addendum
But no matter which tool I use I always get a different keyword density result
and Deepsand look again I have found the links on page reporting to be very accurate
Oh and lastly.....you're asking me to do math to validate??? Wassup wit dat?