PolyType by: Eirik Tsarpalis

Practical generic programming for C#

Pomelo.EntityFrameworkCore.MySql by: Laurents Meyer, Caleb Lloyd, Yuko Zheng

Pomelo's MySQL database provider for Entity Framework Core.

Pomelo.JsonObject by: Pomelo.JsonObject

MySQL provider for Entity Framework Core

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

Pragmastat by: Andrey Akinshin

Pragmatic Statistical Toolkit

prometheus-net by: andrasm, qed-, lakario, sandersaares

.NET client library for the Prometheus monitoring and alerting system

prometheus-net.AspNetCore by: andrasm, qed-, lakario, sandersaares

ASP.NET Core middleware and stand-alone Kestrel server for exporting metrics to Prometheus

prometheus-net.SystemMetrics by: Daniel Lo Nigro

Export system metrics (CPU usage, disk usage, etc) to Prometheus from your .NET app.

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.Grpc by: Marc Gravell

Code-first gRPC for .NET: declare services as .NET interfaces, with no .proto file and no generated client; shared core for clients and servers

protobuf-net.Grpc.Reflection by: Marc Gravell

Generates .proto schemas from code-first gRPC contracts, and implements the gRPC reflection service

protobuf-net.Reflection by: Marc Gravell

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

PuppeteerSharp by: Darío Kondratiuk

Headless Browser .NET API

pythonnet by: Python.Runtime

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

Qb.Net by: viten-center

QueryBuilder allows you to create queries against a database, describing them as an object, without using tools such as LinqToSql, ORM, etc. and generate their SQL code in the syntax of the DBMS used

QLNet by: Andrea Maggiulli

A free/open-source library for quantitative finance

QuantConnect.Algorithm by: QuantConnect.Algorithm

QuantConnect LEAN Engine: Algorithm Project - Core QCAlgorithm implementation

QuantConnect.Algorithm.CSharp by: QuantConnect.Algorithm.CSharp

QuantConnect LEAN Engine: Algorithm.CSharp Project - A collection of C# algorithm demonstrations for how to use the API