Enums.NET by: Tyler Brinkley

Enums.NET is a high-performance type-safe .NET enum utility library

ExtendedNumerics.BigDecimal by: https://github.com/AdamWhiteHat

Arbitrary precision decimal class

FirebirdSql.Data.FirebirdClient by: FirebirdSQL

Firebird ADO.NET Data provider

FluentMigrator by: Josh Coffman Tom Marien

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 Tom Marien

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.

FluentNHibernate by: James Gregory and contributors

Fluent, XML-less, compile safe, automated, convention-based mappings for NHibernate.

FluentValidation by: Jeremy Skinner

A validation library for .NET, Silverlight and WP7 that uses a fluent interface to construct strongly-typed validation rules.

Fody by: Fody

Extensible tool for weaving .net assemblies.

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.

Google.Apis by: Google Inc.

Google APIs Client Library (Contact me whenever new versions are available!)

GraphQL by: Joseph T. McBride

GraphQL for .NET

GraphQL-Parser by: Marek Magdziak

Library containing lexer and parser for GraphQL syntax

GraphQL.Analyzers by: Joe McBride

GraphQL.Analyzers

HangFire.SqlServer by: Sergey Odinokov

SQL Server / SQL Azure job storage implementation for HangFire (background job system for ASP.NET applications).

Hangfire.SqlServer by: Sergey Odinokov

SQL Server 2008+ (including Express), SQL Server LocalDB and SQL Azure storage support for Hangfire, a background job framework for .NET applications.

Hardcodet.NotifyIcon.Wpf by: Philipp Sumi

This is an implementation of a NotifyIcon (aka system tray icon or taskbar icon) for the WPF platform. It does not just rely on the Windows Forms NotifyIcon component, but is a purely independent control which leverages several features of the WPF framework in order to display rich tooltips, popups, context menus, and balloon messages. It can be used directly in code or embedded in any XAML file. Source code and extensive sample application available at http://www.hardcodet.net/projects/wpf-notifyicon

Humanizer by: Mehdi Khalili Claire Novotny

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.

Iesi.Collections by: Aidant Systems Jason Smith NHibernate community

The System.Collections namespace in the .NET Framework provides a number of collection types that are extremely useful for manipulating data in memory. However, there is one type of collection that is conspicuously missing from System.Collections: the Set.

Ionic.Zip by: Dino Chiesa

Ionic.Zip

JetBrains.Annotations by: JetBrains

JetBrains.Annotations help reduce false positive warnings, explicitly declare purity and nullability in your code, deal with implicit usages of members, support special semantics of APIs in ASP.NET and XAML frameworks and otherwise increase accuracy of JetBrains Rider and ReSharper code inspections. All usages of JetBrains.Annotations attributes are erased from metadata by default, which means no actual binary reference to 'JetBrains.Annotations.dll' assembly is produced. If you need to preserve these attributes in metadata, just define 'JETBRAINS_ANNOTATIONS' conditional compilation symbol in your projects.