PacketDotNet by: Chris Morgan

High performance .Net assembly for dissecting and constructing network packets such as ethernet, ip, tcp, udp etc.

PdfLibCore by: Jan Baarssen

PdfLib CORE is a fast PDF editing and reading library for modern .NET core applications.

PdfPig by: UglyToad

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

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.

PInvoke.BCrypt by: Andrew Arnott

P/Invoke methods for the Windows BCrypt.dll.

PInvoke.Kernel32 by: Andrew Arnott

P/Invoke methods for the Windows Kernel32.dll.

PInvoke.NCrypt by: Andrew Arnott

P/Invoke methods for the Windows NCrypt.dll.

PInvoke.Windows.Core by: Andrew Arnott

P/Invoke types for common Windows APIs.

PocketLogger by: jonsequitur

An embeddable logging and telemetry library for concise, multi-purpose instrumentation of library or application code.

Polly by: Michael Wolfenden, App vNext

Polly is a .NET 3.5 / 4.0 / 4.5 / PCL (Profile 259) / NET Standard 1.0 library that allows developers to express transient exception and fault handling policies such as Retry, Retry Forever, Wait and Retry or Circuit Breaker in a fluent manner.

Polly-Signed by: Michael Wolfenden, App vNext

Polly is a .NET 3.5 / 4.0 / 4.5 / PCL (Profile 259) / NET Standard 1.0 library that allows developers to express transient exception and fault handling policies such as Retry, Retry Forever, Wait and Retry or Circuit Breaker in a fluent 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: Claire Novotny

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

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

prometheus-net by: andrasm, qed-, lakario

.NET client for prometheus.io

protobuf-net by: Marc Gravell

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

protobuf-net.Core by: Marc Gravell

The protobuf-net serialization engine and build-time tooling; most projects should reference protobuf-net, which adds the runtime type model

protobuf-net.Reflection by: Marc Gravell

ProtoBuf DSL (proto2 / proto3) and descriptor tools for protobuf-net

pythonnet by: pythonnet

Python and CLR (.NET and Mono) cross-platform language interop