title: Recommend a good javascript statistics library?
body: <p>Can anyone recommend a good javascript statistics library?</p>
  
  <p>Perhaps one recommendation per question, and let the votes push the best to the top.  </p>
  
  <p>note: 
  Searching for javascript statistics seems lead one towards attempts at gathering statistics, I'm more interested in actual statistical calculations such as standard deviation and the like.</p>