A port of Coda Hale's excellent metrics library for the JVM
<https://github.com/codahale/metrics>
For motivation about why you might want to track application metrics, check Coda's talk:
<http://www.youtube.com/watch?v=czes-oa0yik>
Interesting portions of this package's documentation were also appropriated from the metrics library's documentation:
<http://metrics.codahale.com>.