Apache module for Ruby on Rails on Windows

Apache module for Ruby on Rails on Windows

I have a none standard need: I am going to develop an application that is
part desktop app, part web app, but both are running on my customers
machines. So there will be an install that will install everything,
including the web server(s) on the customers machine. One requirement is
that this system target both Windows and OSX users. I have three viable
options: Java, PHP, or Ruby on Rails. My preference is Ruby on Rails, but
I need to find an Apache module that will work with Windows. Is there such
a beast? If not, how do folks run Ruby on Rails on Windows under Apache?
I am fully aware of the fact that Ruby on Rails does not need Apache, but
the application will need Apache to fulfill all it's requirements. Thus
the preference would be for an Apache module. If that isn't possible, I am
open to other options.