Open-XML-SDK 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.

OpenMcdf by: Federico Blaseotto

OpenMcdf is a 100% .net / C# component that allows developers to manipulate Microsoft Compound Document File Format for OLE structured storage. It supports read/write operations on streams and storages and traversal of structures tree.

Otp.NET by: Kyle Spearrin

An implementation of TOTP and HOTP which are commonly used for multi factor authentication by using a shared key between the client and the server to generate and verify one time use codes. For documentation and examples visit the project website on GitHub at https://github.com/kspearrin/Otp.NET

PdfSharpCore by: Stefan Steiger and Contributors

PdfSharp for .NET Core PdfSharpCore is a partial port of PdfSharp.Xamarin for .NET Core Additionally MigraDoc has been ported as well (from version 1.32). Images have been implemented with ImageSharp from https://www.nuget.org/packages/SixLabors.ImageSharp

PdfSharpCore.Charting by: Stefan Steiger and Contributors

PdfSharpCore.Charting for .NET Core PdfSharpCore.Charting was ported from PdfSharp

PeterO.Cbor by: Peter Occil

A C# implementation of Concise Binary Object Representation (CBOR), a general-purpose binary data format defined in RFC 8949.

PeterO.DataUtilities by: Peter Occil

A portable library for .NET for text strings and reading and writing to them.

PeterO.Numbers by: Peter Occil

A C# library that supports arbitrary-precision binary and decimal floating-point numbers and rational numbers with arbitrary-precision components, and supports arithmetic with these numbers.

PeterO.URIUtility by: Peter Occil

A portable library for .NET for processing URIs (uniform resource identifiers) and IRIs (internationalized resource identifiers).

Polly by: Michael Wolfenden App vNext

Polly is a library that allows developers to express resilience and transient fault handling policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback in a fluent and thread-safe manner.

Polly-Signed by: Michael Wolfenden App vNext

Polly is a .NET 4.5 / .NET Standard 1.1 library that allows developers to express resilience and transient fault handling policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation and Fallback in a fluent and thread-safe manner.

Polly.Extensions.Http by: App vNext

Polly.Extensions.Http is an extensions package containing opinionated convenience methods for configuring Polly policies to handle transient faults typical of calls through HttpClient.

Polly.Extensions.Http-Signed by: App vNext

Polly.Extensions.Http is an extensions package containing opinionated convenience methods for configuring Polly policies to handle transient faults typical of calls through HttpClient.

Portable.BouncyCastle by: Oren Novotny

BouncyCastle portable version with support for .NET 4, .NET Standard 1.0-2.0, .NET Core

PreMailer.Net by: Martin H. Normark

PreMailer.Net is a C# utility for moving CSS to inline style attributes, to gain maximum E-mail client compatibility.

Prism.Core by: Brian Lagunas Dan Siegel

Prism is a fully open source version of the Prism guidance originally produced by Microsoft Patterns & Practices. Prism provides an implementation of a collection of design patterns that are helpful in writing well structured and maintainable XAML applications, including MVVM, dependency injection, commanding, event aggregation, and more. Prism's core functionality is a shared code base in a Portable Class Library targeting these platforms; WPF, Windows 10 UWP, and Xamarin Forms. Features that need to be platform specific are implemented in the respective libraries for the target platform.

QuestPDF by: MarcinZiabek

Generate and edit PDF documents in your .NET applications using the open-source QuestPDF library and its C# Fluent API. Build invoices, reports and data exports with ease.

Remotion.Linq by: rubicon IT GmbH

re-linq Frontend: A foundation for parsing LINQ expression trees and generating queries in SQL or other languages. Key features: - Transforms expression trees into abstract syntax trees resemblying LINQ query expressions (from ... select syntax) - Simplifies many aspects of this tree (sub queries, transparent identifieres, pre-evaluation ...) - Provides basic infrastructure for backend development (e.g. SQL generation) - Provides a framework for user-defined query extensions and transformations

Renci.SshNet.Async by: Ioannis G.

Extends Renci.SshNet to implement the task-based async pattern

RtfPipe by: Eric Domke

RtfPipe is a .NET library for parsing Rich Text Format (RTF) streams and converting them to HTML