Ramaze by Example(blog.purepistos.net)

  # helloworld.rb
  require 'ramaze'

  class MainController < Ramaze::Controller
    def index
      "hi world!"
    end
  end

  Ramaze.start :adapter => :thin, :port => 3000

  # ruby helloworld.rb
  # curl http://localhost:3000/ => "hi world!"