gistfile3.builder

require "sinatra"
get("/") { "Hello World!" }

gistfile4.PL

use Dancer;
use Template;
get '/' => sub { template 'home' };
dance;

gistfile5.pyw

from itty import get, run_itty

@get('/')
def index(request):
    return 'Hello World!'

run_itty()

gistfile6.js

require('express')
get('/user', function(){
  "Hello World!"
})

gistfile7.clj

(ns hello-world
  (:use compojure.core
        ring.adapter.jetty))

(defroutes main-routes
  (GET "/" []
    "Hello World")
  (ANY "*" []
    {:status 404, :body "<h1>Page not found</h1>"}))

(run-jetty main-routes {:port 8080})

gistfile8.lua

require 'mercury'
module('hello', package.seeall, mercury.application)
get('/', function() 
  return "Hello world!"
end)

gistfile9.go

package main

import (
    "web"
)

func hello(val string) string { return "Hello world!" } 

func main() {
    web.Get("/", hello)
    web.Run("0.0.0.0:9999")
}

Java

import wandledi.java.Controller;

public class WandlediApp extends Controller {

    public void index() {
        getWriter().println("Hello World!");
    }

    public static void main(String[] args) {
        runStandAlone(true);
    }
}

Scala

package com.thinkminimo.step

class StepExample extends Step {
  get("/") { "Hello World!" }
}

Maybe it's a bit of a stretch to call Wandledi Sinatra-like.
But I just wanted to show how you can make a simple app with it
writing also not so many lines of code.

In Wandledi you actually can't simply map arbitrary URIs within a single controller.
For this you would first have to define a route mapping the different URIs to the
respective actions of the controller.