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.

DocumentFormat.OpenXml.Framework 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.

EasyCaching.Core by: ncc, Catcher Wong

EasyCaching is a open source caching library that contains basic usages and some advanced usages of caching which can help us to handle caching more easier!

EasyCaching.Redis by: ncc, Catcher Wong

A simple distributed caching provider based on StackExchange.Redis.

EFCoreSecondLevelCacheInterceptor by: Vahid Nasiri

Entity Framework Core Second Level Caching Library.

Elasticsearch.Net by: Elastic and contributors

Exposes all the Elasticsearch API endpoints but leaves you in control of building the request and response bodies. Comes with built in cluster failover/connection pooling support.

ExcelNumberFormat by: ExcelNumberFormat developers

.NET library to parse ECMA-376 number format strings and format values like Excel and other spreadsheet softwares.

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.

FFmpeg.AutoGen by: Ruslan Balanukhin

FFmpeg auto generated unsafe bindings for C#/.NET and Mono.

FFMpegCore by: Malte Rosenbjerg, Vlad Jerca, Max Bagryantsev

A .NET Standard FFMpeg/FFProbe wrapper for easily integrating media analysis and conversion into your .NET applications

FirebaseAdmin by: Google Inc.

Firebase Admin SDK enables server-side .NET developers to integrate Firebase into their services and applications.

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.

FluentValidation.AspNetCore by: Jeremy Skinner

AspNetCore integration for FluentValidation

FluentValidation.DependencyInjectionExtensions by: Jeremy Skinner

Dependency injection extensions for FluentValidation

GenFu by: misterjames, dpaquette, stimms

GenFu is a library you can use to generate realistic test data.

Google.Api.Gax by: Google LLC

Support classes for Google API client libraries

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.