Varnish-ducksboard is a project mainly written in Haskell, it's free.
Small ducksboard widget experiment. Reports request/min from varnish
This small haskell daemon expects a stream from varnishlog on stdin and will try to post stats to a duckboards graph widget every minute.
cd varnish-ducksboard cabal install
export DB_KEY=<duckboards api key>
export DB_WIDGET_ID=<numeric id of the widget to post to>
varnishlog | varnish-ducksboard-widget