Moksy is an open source .Net library for stubbing, mocking and simulating web services.
Intended to be driven from MsTest (or your favorite testing framework), Moksy will create a real HTTP Server end-point that your system under test or other services can hit.
For example:
Moksy.Common.Proxy proxy = new Moksy.Common.Proxy(10011);
proxy.Start();
var simulation = SimulationFactory.When.I.Get().From("/TheEndpoint").Then.Return.Body("Hello World!").And.StatusCode(System.Net.HttpStatusCode.OK);
proxy.Add(simulation);
Navigating to http://localhost:10011/TheEndpoint in your browser or hitting that Url from another service will return "Hello World!".
This release has a strong focus on testing JSON-based web services.