QRCoder by: Raffael Herrmann Shane Krueger

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

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.

Quartz by: Marko Lahma

Quartz Scheduling Framework for .NET

Quartz.Serialization.Json by: Marko Lahma

Quartz.NET JSON Serialization Support

QueryDesigner by: Vladislav Zhukov

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

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.

Quill.Delta by: blushingpenguin nozer

Converts Quill's Delta format to HTML/XHTML

RabbitMQ.Client by: VMware

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

RavenDB.Client by: Hibernating Rhinos

RavenDB Client is the client library for accessing RavenDB

RBush by: viceroypenguin

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

ReflectionBridge by: Stef Heyenrath

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

Refractored.MvvmHelpers by: James Montemagno

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

Reloadify3000 by: James Clancey

Hot Reload plugin for Comet

Remotion.Linq by: rubicon IT GmbH

re-linq Frontend: A foundation for parsing LINQ expression trees and generating queries in SQL or other languages. Key features: - Transforms expression trees into abstract syntax trees resemblying LINQ query expressions (from ... select syntax) - Simplifies many aspects of this tree (sub queries, transparent identifieres, pre-evaluation ...) - Provides basic infrastructure for backend development (e.g. SQL generation) - Provides a framework for user-defined query extensions and transformations

Respawn by: Jimmy Bogard

Intelligent checkpoints for database tests

Respond by: Scott Jehl Paul Irish Nicholas Zakas

The goal of this script is to provide a fast and lightweight (3kb minified / 1kb gzipped) script to enable responsive web designs in browsers that don't support CSS3 Media Queries - in particular, Internet Explorer 8 and under. It's written in such a way that it will probably patch support for other non-supporting browsers as well (more information on that soon).

RestSharp by: John Sheehan Andrew Young Alexey Zimarev and RestSharp community

Simple REST and HTTP API Client

RhinoMocks by: meisinger ayende

Dynamic mocking framework for .NET

Roslyn.Diagnostics.Analyzers by: Microsoft

Private analyzers specific to Roslyn repo. These analyzers are not intended for public consumptions outside of the Roslyn repo.

RouteJs.Mvc5 by: Daniel Lo Nigro

JavaScript URL routing for ASP.NET MVC. Allows you to use your ASP.NET MVC routes from JavaScript. Please refer to project site (http://dan.cx/projects/routejs) for more details, usage examples and sample code.