EntityFramework by: Microsoft

Entity Framework 6 (EF6) is a tried and tested object-relational mapper for .NET with many years of feature development and stabilization.

Enums.NET by: Tyler Brinkley

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

EPPlus by: Jan Källman

A library to manage Excel spreadsheets, using OOXML.

Esprima by: Sebastien Ros

Standard-compliant ECMAScript 2016 parser (also popularly known as JavaScript or ES6).

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

Arbitrary precision decimal class

FastEndpoints by: FastEndpoints

A light-weight REST Api framework for ASP.Net 6 and newer that implements REPR (Request-Endpoint-Response) Pattern.

FastMember by: Marc Gravell

In .NET reflection is slow... well, kinda slow. If you need access to the members of an arbitrary type, with the type and member-names known only at runtime - then it is frankly hard (especially for DLR types). This library makes such access easy and fast.

FastMember.Signed by: Marc Gravell

In .NET reflection is slow... well, kinda slow. If you need access to the members of an arbitrary type, with the type and member-names known only at runtime - then it is frankly hard (especially for DLR types). This library makes such access easy and fast.

Fhir.Metrics by: Martijn Harthoorn

Conversion system for physical units, with UCUM implementation - The Unified Code for Units of Measure

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.

FluentNHibernate by: James Gregory and contributors

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

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.

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, portable, testable HTTP client library.

Fody by: The Fody Team

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.

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

GeoAPI by: NetTopologySuite Team

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