This dll takes some of the pain away from registering routes in OpenRasta.
It's on Nuget as "OpenRasta.Routing"

So instead of registering routes like this :

  using (OpenRastaConfiguration.Manual)
  {

    ResourceSpace.Has.ResourcesOfType<object>()
      .AtUri("/foo/{id}").Named("view-foo")
      .HandledBy<FooHandler>()
      .AsJsonDataContract()
      .And.AsXmlDataContract();
  }

You can just call :

  using (OpenRastaConfiguration.Manual)
	{
		// Register all handler's routes in given assembly(s), and all model/wire types in given assembly(s)
		Routing.Register(typeof(FooHandler).Assembly, typeof(Foo).Assembly);
	}

And then tag your handlers : 

    public class FooHandler 
    {
        [Get("/foo/{id}")]
        public OperationResult Foo()
        {
            return new OperationResult.OK
            {
                ResponseResource = new Foo()
            };
        }

There are attributes for Get, Post, Put, Patch and Delete