QRCoder by: Raffael Herrmann Shane Krueger

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

RavenDB.Client by: Hibernating Rhinos

RavenDB Client is the client library for accessing RavenDB

protobuf-net by: Marc Gravell

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

Portable.BouncyCastle by: Oren Novotny

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

popper.js by: FezVrasta

A kickass library to manage your poppers

prometheus-net by: andrasm qed- lakario

.NET client for prometheus.io

RBush by: viceroypenguin

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

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

Quill.Delta by: blushingpenguin nozer

Converts Quill's Delta format to HTML/XHTML

QRCoder.Core by: Afonso Dutra Nogueira Filho

QRCoder.Core, written in C#.NET, which enables you to create QR codes Use System.Drawing.Common below 7.0.0.

QuestPDF by: MarcinZiabek

QuestPDF is a modern PDF generation library for C# and .NET. Create invoices, reports, and data exports — a code-first alternative to HTML-to-PDF conversion. Merge and edit documents, generate PDF/A and accessible PDF/UA files, embed ZUGFeRD and Factur-X invoice XML. Source-available with a free Community license.

Quartz by: Marko Lahma

Quartz.NET Scheduling Framework for .NET Platform

Quartz.Serialization.Json by: Marko Lahma

Quartz.NET JSON Serialization Support

Portable.JWT by: Mitja Bombac

JWT (JSON Web Token) Portable Implementation for .NET 4.5+ (Public Domain). Supported algorithms: HMAC signatures with HS256, HS384 and HS512.

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

PtgPdfCore.runtime.win by: patagames.com

Runtime native library assets for the Pdfium.Net SDK package (id:pdfium.net.sdk) - win-x64, win-x86.

PtgPdfCore.runtime.osx by: patagames.com

Runtime native library assets for the Pdfium.Net SDK package (id:pdfium.net.sdk) - universal binary x86_64, arm64.

PtgPdfCore.runtime.android by: patagames.com

Runtime native library assets for the Pdfium.Net SDK package (id:pdfium.net.sdk) - android-x64, android-x86, android-arm, android-arm64.

PtgPdfCore.runtime.linux by: patagames.com

Runtime native library assets for the Pdfium.Net SDK package (id:pdfium.net.sdk) - linux-x64, linux-x86, linux-arm, linux-arm64.

PtgPdfCore.runtime.linux-musl by: patagames.com

Runtime native library assets for the Pdfium.Net SDK package (id:pdfium.net.sdk) - linux-musl-x64, linux-musl-x86, linux-musl-arm, linux-musl-arm64.