Top 20 NuGet test Packages

Adds QUnit js/css to ASP.NET MVC Razor projects and Cshtml Test Runner web page to /QUnitTests/index.cshtml. Just put your tests into js files in /QUnitTests folder. The test runner scans for all of them. Feel free to rename QUnitTests testing folder to anything you like. Please send any suggestion...
Library of static analysis assertions for .NET unit tests
Utility for filling objects with data. Supports: Primitive Types, Arrays, IEnumerable<>, IList<>, ICollection<>, ISet<>, IDictionary<>, List<>, HashedSet<>, Dictionary<> and hopefully most of user custom classes
Code First API Library, Scaffolding and Guidance for Coded UI Tests
Simplify integrationtesting via http.
Add Expect (as Jasmine) behavior to NUnit to use instead of Assert.X
Automocking container using Microsoft Unity and Moq. Signed version.
OpenCodeCoverageFramework is a framework for measurement of test coverage supporting multiple programming languages.
A library for automatic regressiontesting of applications / Coded UI Tests. This library allows you to write tests for your WPF applications. The library uses MS UI Automation and TestApi to mimic the user interaction.
Test fixtures for .NET and MongoDB to make integration testin a little easier.
Simple library for hosting WebApi services in their own AppDomain for integration testing purposes.
Uses PhantomJS to run your mocha/chai/sinon test suite, shows results in your NUnit test runner
Lightweight helper APIs simplifying IIS,IISExpress and Nuget packages management in tests
A repositiory wrapper for the Entity Framework offering full unit test support through interfaced DbContext and nested unit of works for DB first and model first setups. See http://nqueries.codeplex.com for installation details.
Crowbar is an application testing library for ASP.NET MVC 3 and 4.
xRM Framework Fakes Test Library for Dynamics CRM 2013
xRM Framework Moq Test Library for Dynamics CRM 2013
The TestHelper library allows simpler unit testing on Asp.net MVC controllers than can be accomplished through standard mocking and subclassing. It is designed to reduce the amount of work required to test controllers, and therefore should be used by your test projects but not in your web server pro...
MagicMoq is an extension to the Moq mocking framework – It is like an IoC container that injects mocked dependencies when resolving a type, making the job of creating testing subjects much easier (and nicer).