wtop - Google Code
wtop is like "top" for your webserver. How many searches or signups are happening per second? What is the response time histogram for your static files? wtop shows you at a glance.
Overview — Phusion Passenger (a.k.a. mod_rails)
Phusion Passenger — a.k.a. mod_rails — makes deployment of applications built on the revolutionary Ruby on Rails web framework a breeze. It follows the usual Ruby on Rails conventions, such as “Don’t-Repeat-Yourself”.