FastEndpoints.Security by: FastEndpoints

Security library for FastEndpoints.

FastExpressionCompiler.src by: Maksim Volkau

FastExpressionCompiler is 10-40x times faster than Expression.Compile()

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.

FluentValidation by: Jeremy Skinner

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

Fluid.Core by: Sebastien Ros

Fluid is a template engine based on the Liquid markup, with focus on performance and .NET programming patterns.

GeoAPI.CoordinateSystems by: NetTopologySuite Team

GeoAPI.NET project provides a common framework based on OGC/ISO standards to improve interoperability among .NET GIS projects.

Gherkin by: Cucumber Ltd, Gaspar Nagy

Cross-platform parser for the Gherkin language, used by Cucumber, SpecFlow and other Cucumber-based tools to parse feature files.

Google.Protobuf by: Google Inc.

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

Grpc by: The gRPC Authors

Metapackage for gRPC C#

Grpc.Core.Api by: The gRPC Authors

gRPC C# Surface API

Grpc.Net.Client by: The gRPC Authors

.NET client for gRPC

Grpc.Net.ClientFactory by: The gRPC Authors

HttpClientFactory integration the for gRPC .NET client

Grpc.Net.Common by: The gRPC Authors

Infrastructure for common functionality in gRPC

Handlebars.Net by: Rex Morgan

Blistering-fast Handlebars.js templates in your .NET application.

HarfBuzzSharp by: Microsoft

HarfBuzzSharp is a cross-platform OpenType text shaping engine for .NET platforms.

HarfBuzzSharp.NativeAssets.Android by: Microsoft

HarfBuzzSharp is a cross-platform OpenType text shaping engine for .NET platforms.

HarfBuzzSharp.NativeAssets.iOS by: Microsoft

HarfBuzzSharp is a cross-platform OpenType text shaping engine for .NET platforms.

HarfBuzzSharp.NativeAssets.Tizen by: Microsoft

HarfBuzzSharp is a cross-platform OpenType text shaping engine for .NET platforms.

HarfBuzzSharp.NativeAssets.Win32 by: Microsoft

HarfBuzzSharp is a cross-platform OpenType text shaping engine for .NET platforms.

HtmlAgilityPack by: ZZZ Projects, Simon Mourrier, Jeff Klawiter, Stephan Grell

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).