BouncyCastle.NetCore by: BouncyCastle

a BouncyCastle redist package include .Net Framework and .Net Core/ Standard support

Castle.Core by: Castle Project Contributors

Castle Core, including DynamicProxy, Logging Abstractions and DictionaryAdapter

CommandLineParser by: gsscoder nemec ericnewton76

Terse syntax C# command line parser for .NET. For FSharp support see CommandLineParser.FSharp. The Command Line Parser Library offers to CLR applications a clean and concise API for manipulating command line arguments and related tasks.

CommonServiceLocator by: .NET Foundation and Contributors

The library provides an abstraction over IoC containers and service locators. Using the library allows an application to indirectly access the capabilities without relying on hard references.

CommunityToolkit.WinUI.Notifications by: Microsoft.Toolkit, dotnetfoundation

The official way to send toast notifications on Windows 10 via code rather than XML, with the help of IntelliSense. Supports all C# app types, including WPF, UWP, WinForms, and Console, even without packaging your app as MSIX. Also supports C++ UWP apps. Additionally, generate notification payloads from your ASP.NET web server to send as push notifications, or generate notification payloads from class libraries. For UWP/MSIX apps, you can also generate tile and badge notifications.

ConsoleAppFramework by: Cysharp

Zero Dependency, Zero Overhead, Zero Reflection, Zero Allocation, AOT Safe CLI Framework powered by C# Source Generator.

CsvHelper by: Josh Close

A library for reading and writing CSV files. Extremely fast, flexible, and easy to use. Supports reading and writing of custom class objects.

Dapper by: Sam Saffron, Marc Gravell, Nick Craver

A high performance Micro-ORM supporting SQL Server, MySQL, Sqlite, SqlCE, Firebird etc..

DocumentFormat.OpenXml by: Microsoft

The Open XML SDK provides tools for working with Office Word, Excel, and PowerPoint documents. It supports scenarios such as: - High-performance generation of word-processing documents, spreadsheets, and presentations. - Populating content in Word files from an XML data source. - Splitting up (shredding) a Word or PowerPoint file into multiple files, and combining multiple Word/PowerPoint files into a single file. - Extraction of data from Excel documents. - Searching and replacing content in Word/PowerPoint using regular expressions. - Updating cached data and embedded spreadsheets for charts in Word/PowerPoint. - Document modification, such as removing tracked revisions or removing unacceptable content from documents.

DotLiquid by: Tim Jones, Alessandro Petrelli

DotLiquid is a templating system ported to the .NET framework from Ruby’s Liquid Markup.

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.

EPPlus by: Jan Källman

A library to manage Excel spreadsheets, using OOXML.

FastEndpoints by: FastEndpoints

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

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.

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.

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#