Top 20 NuGet stubbing Packages

It's faking amazing! The easy mocking framework for .NET that works great in C# and VB.NET alike. No need to know the difference between a stub, a mock or a spy, everything's a fake! The easy to use, refactoring friendly API makes faking a breeze.
The most powerful free mocking library available for .NET developers.
Foq is a lightweight thread-safe mocking library for F#, C#, and VB with a similar API to Moq.
A .Net Library for Hoverfly
Deleporter Core (use Deleporter.Server/Deleporter.Client for easy setup) - Simple Cross Process Stubbing. Deleporter is a lightweight .NET library that teleports arbitrary delegates into an ASP.NET application in some other process (e.g. hosted in IIS) and runs them there. One use case is stubbing ...
Deleporter - Simple Cross Process Stubbing. Facilitates stubbing out dependencies when running automated browser tests against ASP.Net. Use in conjunction with your favorite mocking/IOC frameworks. Deleporter will teleport mock objects (or any arbitrary delegates) into a remote ASP.Net application, ...
The Moq.FSharp.Extensions provide extension methods and functions to enhance the Moq experience in F#.
DynMock is a mocking framework supports dynamic classes. Also, DynMock's current comparative tests shows that it can run mock significantly faster than FakeItEasy, Moq, and NSubstitute. Note that the current DynMock comparative tests for Moq and NSubstitute are not covering most of their functionali...
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 p...
Foq2 is a lightweight thread-safe mocking library for F# 4 with a similar API to Moq.
Deleporter - Simple Cross Process Stubbing. Facilitates stubbing out dependencies when running automated browser tests against ASP.Net. Use in conjunction with your favorite mocking/IOC frameworks. Deleporter will teleport mock objects (or any arbitrary delegates) into a remote ASP.Net application, ...
Adds the current SeleniumServer.jar (27MB) to the project (requires Java to run - http://java.com). Pulls in Selenium.Support. Useful for headless browser testing where you don't want to be bothered with setting up Selenium Server. Note, if you already have a SeleniumServer.jar on your system, you c...
Tool that allows you to extend the capabilities of Microsoft.AspNetCore.TestHost.TestServer, allowing you to run more comprehensive + deterministic tests by: - intercepting Http calls, returning mock responses - asserting outgoing Http calls - recording outgoing Http calls (requests and responses), ...