Top 20 NuGet mocking Packages

Moq is the most popular and friendly mocking framework for .NET. Built from https://github.com/moq/moq4/tree/f2aa090ff
The most powerful free mocking library available for .NET developers.
Pester is testing framework for PowerShell, written in PowerShell.
Utilities to streamline unit testing in Dynamics CRM 2011 by faking the IOrganizationService against an In-Memory context which runs blazingly fast.
Utilities to streamline unit testing in Dynamics CRM 2013 by faking the IOrganizationService against an In-Memory context which runs blazingly fast.
Utilities to streamline unit testing in Dynamics CRM 2015 by faking the IOrganizationService against an In-Memory context which runs blazingly fast.
Utilities to streamline unit testing in Dynamics CRM 2016 by faking the IOrganizationService against an In-Memory context which runs blazingly fast.
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.
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.
Utilities to streamline unit testing in Dynamics CRM 365 by faking the IOrganizationService against an In-Memory context which runs blazing fast.
Autofac extension supporting generation of FakeItEasy objects.
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).
Contributed features and third-party integration for Moq.
Fody add-in for changing all members to virtual.
Utilities to streamline unit testing in Dynamics CRM 365 by faking the IOrganizationService against an In-Memory context which runs blazing fast.
NMock3 is a Mocking framework that uses lambda syntax to setup expectations and test interactions between classes and interfaces.
It's what a Mocking Framework should be. Powerful. And it's the first of its kind.
Library that provides methods that will help you with mocking Entity Framework Core.
Moq auto mocking integration for Stashbox.
FakeItEasy auto mocking integration for Stashbox.