Rubygem-passenger is a project mainly written in ..., it's free.
An RPM-based install of Phusion Passenger (aka mod_rails / mod_rack)
= THIS PROJECT HAS MOVED
This project has been merged into the {Phusion Passenger}[http://github.com/FooBarWidget/passenger] repository, in the "rpm" subdirectory.
Thank you for your interest, please look there for further updates!