PCLCrypto by: Andrew Arnott

PCL Crypto provides a consistent, portable set of crypto APIs for .NET 4.5, Windows Phone 8.0 SL & 8.1 Xaml, Windows Store, Xamarin.iOS, Xamarin.Android. This makes it easier to create cross-platform .NET libraries and apps. Crypto functionality includes asymmetric and symmetric encryption and signatures, and key derivation. PCLCrypto calls into each native platform's crypto API for maximum performance. For RSA operations this produces a 2-100X improvement in performance on Android and iOS over using the standard RSACryptoServiceProvider API.

PDFsharp by: empira Software GmbH

PDFsharp is the Open Source .NET library that easily creates and processes PDF documents on the fly from any .NET language. The same drawing routines can be used to create PDF documents, draw on the screen, or send output to any printer. This is the PDFsharp PDF Core package. See Project Information for details.

PhantomJS by: Ariya Hidayat

PhantomJS is a headless WebKit scriptable with a JavaScript API. It has fast and native support for various web standards: DOM handling, CSS selector, JSON, Canvas, and SVG.

Polly by: Michael Wolfenden, App vNext

Polly is a .NET 4.5 / .NET Standard 1.0 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 1.0 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.

PolySharp by: Sergio Pedri

PolySharp provides generated, source-only polyfills for C# language features, to easily use all runtime-agnostic features downlevel

Portable.BouncyCastle by: Oren Novotny

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

Portable.ConcurrentDictionary by: Stef Heyenrath

This is a .NET Standard 1.0, .NET 2.0, .NET 3.5, Silverlight 5.0 and Windows Phone Silverlight 8.0 & 8.1 backport from System.Collections.Concurrent.ConcurrentDictionary as defined in .NET Core

protobuf-net by: Marc Gravell

Provides simple access to fast and efficient "Protocol Buffers" serialization from .NET applications

Quartz by: Marko Lahma

Quartz.NET Scheduling Framework for .NET Platform

RazorEngine by: Matthew Abbott, Ben Dornis

A templating engine built upon Microsoft's Razor parsing technology. RazorEngine allows you to use Razor syntax to build robust templates.

RazorMachine by: Jaap Lamfers

RazorMachine is a robust Razor 2.0/3.0 templating engine that supports layouts as well as a _viewStart construct like Asp.Net MVC

RefactorThis.GraphDiff by: ZZZ Projects Inc., brentmckendrick

This is the official GraphDiff package. GraphDiff - Allows for automatic update of a graph of detached entities using Entity Framework v6+. If you have ever felt the pain of updating a detached graph with one or more nested collections then this is for you :)

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

Remotion.Linq.EagerFetching by: rubicon IT GmbH

Allows LINQ providers based on re-linq Frontend to support eager fetching.

ReportGenerator by: Daniel Palme

ReportGenerator converts XML reports generated by OpenCover, PartCover, dotCover, Visual Studio, NCover, or Cobertura or into human readable reports in various formats. The reports do not only show the coverage quota, but also include the source code and visualize which line has been covered.

RhinoMocks by: meisinger, ayende

Dynamic mocking framework for .NET

Riok.Mapperly by: Mapperly Contributors, Lars Tönz, Manuel Allenspach

A .NET source generator for generating object mappings. No runtime reflection.

Roslyn.Diagnostics.Analyzers by: Microsoft

Private analyzers specific to Roslyn repo. These analyzers are not intended for public consumptions outside of the Roslyn repo.

Roslynator.Analyzers by: Josef Pihrt

A collection of 200+ analyzers for C#, powered by Roslyn.