ExCSS by: Tyler Brinks

ExCSS is a CSS 2.1 and CSS 3 parser for .NET. ExCSS makes it easy to read and parse stylesheets into a friendly object model with full LINQ support.

ExtendedNumerics.BigDecimal by: Adam White, Jan Christoph Bernack, Rick Harker

An arbitrary precision decimal (base 10) floating point number type using a mantissa and exponent. Supports nth roots, trigonometric functions, logarithms, natural e, pi, etc.

FastExpressionCompiler.src by: Maksim Volkau

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

Fizzler by: Atif Aziz, Colin Ramsay

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

Fluent.LibreTranslate by: Partiolainen

Fluent sync/async translation via LibreTranslate

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

FluentValidation.ValidatorAttribute 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.

Flurl by: Todd Menier

A fluent, portable URL builder. To make HTTP calls off the fluent chain, check out Flurl.Http.

Flurl.Http by: Todd Menier

A fluent, testable HTTP client library.

GhostScriptSharp by: https://github.com/mephraim/ghostscriptsharp/

A very simple .NET wrapper for Ghostscript 1.1 pdf conversion toolkit

Google.Api.CommonProtos by: Google LLC

Common Protocol Buffer messages for Google APIs

Google.Api.Gax by: Google LLC

Support classes for Google API client libraries

Google.Api.Gax.Grpc by: Google LLC

Additional support classes for Google gRPC API client libraries

Google.Api.Gax.Grpc.GrpcCore by: Google LLC

Implementation of the GAX GrpcAdapter abstract class based on Grpc.Core

Google.Api.Gax.Rest by: Google LLC

Common Protocol Buffer messages for Google APIs

Google.Apis by: Google LLC

The Google APIs Client Library is a runtime client for working with Google services. The library supports service requests, media upload and download, etc.

Google.Apis.Auth by: Google LLC

The Google APIs Client Library is a runtime client for working with Google services. This package includes auth components like user-credential, authorization code flow, etc. for making authenticated calls using the OAuth2 spec.

Google.Apis.Core by: Google LLC

The Google APIs Core Library contains the Google APIs HTTP layer, JSON support, Data-store, logging and so on.