Top 20 NuGet testing Packages

A tampering mechanism which makes it possible to rewrite methods, getters, setters and constructors of third-party libraries used by the tested code.

A test framework for F#

Specify is a .Net testing library that builds on top of BDDfy from TestStack

This package contains a proxy for the Microsoft.Xrm.Client.CrmOrganizationServiceContext class that supports unit tests

The base class TestFixture provides a registry for test features which are automatically disposed after each test case.

Test feature for temporary database in PostgreSQL server

Selenium Web Driver implementation supporting different browsers and simplified methods for accessing HTML DOM.

Persimmon.Dried.Quotations is extension for Persimmon.Dried.

Allows you to create a lightweight owin server with basic endpoints

You can be friends with UWP App. And You can do anything to it!

Empties data from any specified table and dependent tables.

Selenium driver implementation for the Alias framework.

XUnit test executor implementation for the Alias framework.

In memory stores for MR.AspNet.Identity.EntityFramework6.

In memory stores for Identity 2.

A transport for NSB that runs in memory for integration testing NSB endpoints.

Framework built on top of xUnit to allow writing inheritance based BDD style tests.

Custom patterns could be seen from UIAVerify tool (see TestStack's fork of it) and handy to use in WPF apps because pattern registration has some means to inject new pattern into existing AutomationPeer's structure. Also was tested to some extent with WinForms.

Tools to help test with Entity Framework 6

Using the Tenon.IO api, gives the ability to run accessibility tests for both URL's and source code.