protobuf-net.Core by: Marc Gravell

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

RavenDB.Client by: RavenDB

RavenDB Client is the client library for accessing RavenDB

QueryDesigner by: Vladislav Zhukov

QueryDesigner provides way of creating complex IQueryable filtering based on dynamic expression trees.

realtime-csharp by: Joseph Schultz <joseph@acupofjose.com>

Realtime-csharp is written as a client library for supabase/realtime.

RabbitMQ.Client by: Broadcom

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

Quartz.Serialization.Json by: Marko Lahma Quartz.NET

Quartz.NET JSON Serialization Support; Quartz Scheduling Framework for .NET

RBush by: viceroypenguin

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

QRCoder by: Raffael Herrmann Shane Krueger

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

QuestPDF by: MarcinZiabek

QuestPDF is a modern library for PDF document generation. Its fluent C# API lets you design complex layouts with clean, readable code. Create invoices, reports, and documents using a flexible, component-based approach.

Quartz.Extensions.DependencyInjection by: Facundo Glaeser Marko Lahma Quartz.NET

Quartz.NET Microsoft.Extensions.DependencyInjection integration; Quartz Scheduling Framework for .NET

PuppeteerSharp by: Darío Kondratiuk

Headless Browser .NET API

Quartz by: Marko Lahma Quartz.NET

Quartz Scheduling Framework for .NET

Refractored.MvvmHelpers by: James Montemagno

Collection of MVVM Helpers such as ObservableRangeCollection, BaseViewModel, Grouping, and others.

QRCoder-ImageSharp by: Raffael Herrmann Joerg Plenert

QRCoder is a simple library, written in C#.NET, which enables you to create QR codes. Based on ImageSharp to provide plattform independency.

QRCoder.Core by: Afonso Dutra Nogueira Filho

QRCoder.Core, written in C#.NET, which enables you to create QR codes.

ReflectionBridge by: Stef Heyenrath

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

Quartz.Extensions.Hosting by: Andrew Lock Marko Lahma Quartz.NET

Quartz.NET Generic Host integration; Quartz Scheduling Framework for .NET

Quill.Delta by: blushingpenguin nozer

Converts Quill's Delta format to HTML/XHTML

RBush.Signed by: viceroypenguin

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

Rafty by: Tom Pallister

RAFT consensus implementation