Top 20 NuGet mocking Packages

Moq is the most popular and friendly mocking framework for .NET. Built from https://github.com/moq/moq4/tree/74d58630f
Pester is testing framework for PowerShell, written in PowerShell.
It's faking amazing! The easy mocking library 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.
NSubstitute is a friendly substitute for .NET mocking libraries. It has a simple, succinct syntax to help developers write clearer tests. NSubstitute is designed for Arrange-Act-Assert (AAA) testing and with Test Driven Development (TDD) in mind.
Unit testing framework for Sitecore.
Replace any .NET method (including static and non-virtual) with a delegate
Library that provides methods that will help you with mocking Entity Framework Core.
A set of extension methods for mocking HttpClient and IHttpClientFactory with Moq.
Dynamic mocking framework for .NET
Autofac extension supporting generation of FakeItEasy objects.
Utilities to streamline unit testing in Dynamics CRM 365 by faking the IOrganizationService against an In-Memory context which runs blazing fast.
A C# class library that handles mocking, test data generation, and validation.
Moq auto mocking integration for Stashbox.
Unit testing framework for Sitecore.
Autofac extension supporting generation of NSubstitute objects.
Utilities to streamline unit testing in Dynamics CRM 365 by faking the IOrganizationService against an In-Memory context which runs blazing fast.
A library for implementing the Command Pattern, providing of a set of base classes and an invoker class. Useful for abstracting data access and API calls as either queries (for read operations) or commands (for write operations).
Foq is a lightweight thread-safe mocking library for F#, C#, and VB with a similar API to Moq.
LightMock is a simple mocking library that can be used on platforms that does not allow dynamic code generation.