A Very Simple Sinatra App With TorqueBox

config.ru

require 'rubygems'
require 'sinatra'

module Simple
  class Application < Sinatra::Base
    get '/' do
      "Hello! TorqueBox says it's #{Time.now}."
    end
  end
end
run Simple::Application

simple-knob.yml

--- 
application: 
  root: /path/to/src/simple
  env: development

Put that simple-knob.yml file in $TORQUEBOX_HOME/apps and you're done.