Mmtrix is a performance management system, developed by Mmtrix, Inc (http://www.mmtrix.com). Mmtrix provides you with deep information about the performance of your web application as it runs in production. The Mmtrix Ruby Agent is dual-purposed as a either a Gem or plugin, hosted on http://git....

OneApm Ruby Agent. (http://oneapm.com/features/ruby.html)

TingYun Ruby Agent