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, 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.

Fody by: The Fody Team

Extensible tool for weaving .net assemblies.

FodyHelpers by: The Fody Team

Helpers for Fody.

FodyPackaging by: The Fody Team

NuGet packaging Fody repositories

Gee.External.Capstone by: Ahmed Garhy (@9ee1)

Capstone.NET is an opinionated .NET Core and a .NET Framework binding for the Capstone disassembly framework. It is written in C#, supports Capstone 4, and has a friendly and simple type safe API that is ridiculously easy to learn and quick to pick up.

Google.OrTools by: Laurent Perron

.NET wrapper for the Operations Research Tools project

Google.OrTools.runtime.linux-arm64 by: Laurent Perron

.NET native wrapper for the Operations Research Tools project

Google.OrTools.runtime.linux-x64 by: Laurent Perron

.NET native wrapper for the Operations Research Tools project

Google.OrTools.runtime.osx-arm64 by: Laurent Perron

.NET native wrapper for the Operations Research Tools project

Google.OrTools.runtime.osx-x64 by: Laurent Perron

.NET native wrapper for the Operations Research Tools project

Google.OrTools.runtime.win-x64 by: Laurent Perron

.NET native wrapper for the Operations Research Tools project

Google.Protobuf by: Google Inc.

C# runtime library for Protocol Buffers - Google's data interchange format.

HtmlAgilityPack by: Simon Mourrier, Jeff Klawiter

This is an agile HTML parser that builds a read/write DOM and supports plain XPATH or XSLT (you actually don't HAVE to understand XPATH nor XSLT to use it, don't worry...). It is a .NET code library that allows you to parse "out of the web" HTML files. The parser is very tolerant with "real world" malformed HTML. The object model is very similar to what proposes System.Xml, but for HTML documents (or streams).

Humanizer by: Claire Novotny, Mehdi Khalili

Humanizer meets all your .NET needs for manipulating and displaying strings, enums, dates, times, timespans, numbers and quantities

Hyak.Common by: Microsoft

Provides infrastructure for common error handling, tracing, configuration, and HTTP/REST-based pipeline manipulation for REST clients generated with Hyak.

Independentsoft.Office by: Independentsoft

Independentsoft.Office is Office file format API for .NET Framework, .NET Core, .NET Standard, Mono, Xamarin. Supports Word, Excel, PowerPoint, OpenOffice file formats.

Independentsoft.Office.Odf by: Independentsoft

Independentsoft.Office.Odf is Open Document Format API for .NET Framework, .NET Core, .NET Standard, Mono, Xamarin.

Independentsoft.Office.Spreadsheet by: Independentsoft

Independentsoft.Office.Spreadsheet is Excel file format API for .NET Framework, .NET Core, .NET Standard, Mono, Xamarin.

Interop.UIAutomationClient by: Roemer

The UI Automation COM-to-.NET adapter makes it possible to use the new Windows Automation API 3.0 COM interfaces, with their improved reliability and performance, while still using the same System.Windows.Automation classes as in earlier versions of UI Automation

Irony by: Roman Ivantsov

Irony is a development kit for implementing languages on .NET platform. In Irony the target language grammar is coded directly in c# using operator overloading to express grammar constructs. Irony's scanner and parser modules use the grammar encoded as c# class to control the parsing process.