FakeItEasy by: Patrik Hägne, FakeItEasy contributors

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.

FakeN.Web by: Michael Valenty

Fake implementation of HttpContextBase for terse and expressive tests without the tedious setup of a mocking framework

Fare by: Nikos Baxevanis

.NET port of dk.brics.automaton - Project Fare is an effort to bring a DFA/NFA (finite-state automata) implementation from Java to .NET. There are quite a few implementations available in other languages today. This project aims to fill the gap in .NET.

Firebase.Auth by: Step Up Labs, Inc.

Description

FirebaseAdmin by: Google Inc.

Firebase Admin SDK enables server-side .NET developers to integrate Firebase into their services and applications.

Fizzler by: Atif Aziz, Colin Ramsay

Fizzler is a W3C Selectors parser and generic selector framework for document hierarchies.

FluentAssertions by: Dennis Doomen, Jonas Nyrup, Xceed

A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit tests. Works with .NET Standard 2.0 and higher, .NET Framework 4.7 and higher and .NET 6 and higher. Supports the unit test frameworks MSTest2, MSTest3, MSTest4, NUnit3, NUnit4, XUnit2, XUnit3, MSpec and TUnit. IMPORTANT: This version is free for open-source projects and non-commercial use, but commercial use requires [a paid license](https://xceed.com/products/unit-testing/fluent-assertions/). Check out the [license page](LICENSE) for more information.

FluentAutomation.Core by: Brandon Stirnaman

Fluent Automation is a simplified DSL for web application automation testing.

FluentAutomation.SeleniumWebDriver by: Brandon Stirnaman

Fluent Automation is a simplified DSL for web application automation testing.

FluentMigrator by: Josh Coffman

FluentMigrator is a database migration framework for .NET written in C#. The basic idea is that you can create migrations which are simply classes that derive from the Migration base class and have a Migration attribute with a unique version number attached to them. Upon executing FluentMigrator, you tell it which version to migrate to and it will run all necessary migrations in order to bring your database up to that version. In addition to forward migration support, FluentMigrator also supports different ways to execute the migrations along with selective migrations called profiles and executing arbitrary SQL.

FluentMigrator.Runner by: Josh Coffman

FluentMigrator is a database migration framework for .NET written in C#. The basic idea is that you can create migrations which are simply classes that derive from the Migration base class and have a Migration attribute with a unique version number attached to them. Upon executing FluentMigrator, you tell it which version to migrate to and it will run all necessary migrations in order to bring your database up to that version. In addition to forward migration support, FluentMigrator also supports different ways to execute the migrations along with selective migrations called profiles and executing arbitrary SQL.

FluentResults by: Michael Altmann

A lightweight Result object implementation for .NET

FluentValidation by: Jeremy Skinner

A validation library for .NET that uses a fluent interface to construct strongly-typed validation rules.

FluentValidation.DependencyInjectionExtensions by: Jeremy Skinner

Dependency injection extensions for FluentValidation

Flurl.Http by: Todd Menier

A fluent, portable, testable HTTP client library.

Fody by: The Fody Team

Extensible tool for weaving .net assemblies.

foundation-sites by: ZURB, Inc.

Foundation is the most advanced responsive front-end framework in the world. Quickly go from prototype to production, building sites or apps that work on any kind of device with Foundation. Includes a fully customizable, responsive grid, a large library of Sass mixins, commonly used JavaScript plugins, and full accessibility support. Package Contents: http://foundation.zurb.com/sites/docs/installation.html#package-contents

Fractions by: Daniel Mueller

The fraction data type consists of two BigInteger values for numerator and denominator. It implements various operations (addition, subtraction, multiplication, division and remainder) with operator overloads.

FreeSpire.Doc by: Administrator

Free Spire.Doc for .NET is a professional and reliable word component for commercial and personal use. It enables developers to quickly and easily generate, read, write, save, print and convert documents on any .NET applications (ASP.NET, WinForms and Web Service, .NET Core) and it supports in C#, VB.NET. The featured function, conversion allows converting Word documents (Word 97-2003, Word 2007, Word 2010, Word 2013) to commonly used file format, format, such as XML, RTF, TXT, PDF, XPS, EPUB, HTML and Image etc. Free Spire.Doc for.NET is 100% FREE word component. Free Spire.Doc for .NET Features: *No Microsoft Word Automation *Speed and Easy-to-Use *Batch of Great Functions *High Performance *Totally Free Main functions High quality conversion Rich Word Document Features Process Pre-Existing Word Documents Other Technical Features

FubarCoder.RestSharp.Portable.Core by: Mark Junker, Fubar Development Junker

This is the core RestSharp.Portable library which contains mostly interfaces to allow dependent libraries to use as few dependencies as possible. Supported Platforms: - .NET Standard 1.0 - .NET Framework 4 - Silverlight 5 - Portable Class Libraries (Profiles 259 and 328)