Tool that I had used in the past to manage code churn was StatSVN
http://www.statsvn.org/
It analyzes SVN repo and provides code churn metrics. But, this is for
SVN repo only.
A quick google provided few other tools like FishEye (commercial),
Programeter etc.
But I didn't get anything relating to Hudosn plugin.
Cheers,
Sandeep