PInvoke.BCrypt by: Andrew Arnott

P/Invoke methods for the Windows BCrypt.dll.

RabbitMQ.Client by: VMware

The RabbitMQ .NET client is the official client library for C# (and, implicitly, other .NET languages)

Quartz.Serialization.Json by: Marko Lahma

Quartz.NET JSON Serialization Support

PInvoke.NCrypt by: Andrew Arnott

P/Invoke methods for the Windows NCrypt.dll.

ReflectionBridge by: Stef Heyenrath

Provides some extensions which define a bridge for the differences between Type and TypeInfo.

Quartz by: Marko Lahma

Quartz.NET Scheduling Framework for .NET Platform

Pkcs11Interop by: Jaroslav Imrich

Managed .NET wrapper for unmanaged PKCS#11 libraries

PInvoke.Kernel32 by: Andrew Arnott

P/Invoke methods for the Windows Kernel32.dll.

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.

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

Portable.BouncyCastle by: Oren Novotny

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

Plugin.FirebasePushNotification by: Rendy Del Rosario

Receive and handle firebase push notifications across Xamarin.iOS and Xamarin.Android

Plugin.CurrentActivity by: James Montemagno

Provides a simple solution for getting access to the current Activity of the application when developing a Plugin for Xamarin. This will lay down a base "application" class for developers in their Android application with boilerplate code to get them started.

PdfPig by: UglyToad

Reads text content from PDF documents and supports document creation. Apache 2.0 licensed.

React.Core by: Daniel Lo Nigro

ReactJS and Babel tools for .NET. Important: This package does not do much on its own; you probably want an integration package (like React.Web.Mvc4) as well. Please refer to project site (http://reactjs.net/) for more details, usage examples and sample code.

Plugin.Permissions by: James Montemagno

Check to see if your users have granted or denied permissions for common permission groups on iOS and Android. Additionally, you can request permissions with a simple cross-platform async/awaitified API.

QRCoder by: Raffael Herrmann, Shane Krueger

QRCoder is a simple library, written in C#.NET, which enables you to create QR codes.

RBush by: viceroypenguin

Spatial Index data structure; used to make it easier to find data points on a two dimensional plane.

Radzen.Blazor by: Radzen Ltd.

Radzen Blazor is the most sophisticated free UI component library for Blazor, featuring 100+ native components including DataGrid, Scheduler, Charts, and advanced theming with full support for Material Design and Fluent UI.

PInvoke.Windows.Core by: Andrew Arnott

P/Invoke types for common Windows APIs.