Contributor(s): David Germano
NewRelic RPM is a Rails Performance Management system that monitors the performance of your Ruby on Rails applications as they run in production. For more information, visit www.newrelic.com. It has a free mode, but then also more advanced functions that are available for a modest fee. It is very easy to use and can be a great help in pinpointing problems with RoR applications, including a general need for optimization of the code so that the application works more rapidly.