Top 20 NuGet unittesting 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.
Moq is the most popular and friendly mocking framework for .NET
The most powerful free mocking library available for .NET developers.
Through a fluent, extensible interface, NBuilder allows you to rapidly create test data, automatically assigning values to properties and public fields that are one of the built in .NET data types (e.g. ints and strings). NBuilder allows you to override for properties you are interested in using lam...
It's what a Mocking Framework should be. Powerful. And it's the first of its kind.
.NET port of Hamcrest, a matcher library with some extra matchers
Dynamic mocking framework for .NET
A super simple C# script test runner
A Serilog sink that correlates log events with the code that produced them, enabling unit testing of log output.
Foq is a lightweight thread-safe mocking library for F#, C#, and VB with a similar API to Moq.
Support for unit testing of libraries based on the re-linq SQL Backend.
A .NET library that provides helpers for using Moq on top of the ChannelAdam.TestFramework.
A .NET library for using MSTest (and Moq) on top of the ChannelAdam Test Framework.
A small step for man kind, but a HUGE leap for build scripts.
This library is a contribution to Microsoft Fakes. It allows tests to verify expectations on mocks with an easy and fluent syntax.
Contributed features and third-party integration for Moq.
Speed up your unit test writing by using this helper that leverages AutoMocker to automatically mock dependencies.
A .NET library for using the open source, .NET Standard MSTest V2 (and Moq) on top of the ChannelAdam Test Framework.
A context/specification test framework, heavily inspired by RSpec
StatLight: Tool for executing Silverlight test xap packages or dll assemblies locally during development and in a continuous integration environment.