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

prometheus-net by: andrasm, qed-, lakario

.NET client for prometheus.io

RabbitMQ.Client by: VMware

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

Quartz.Serialization.Json by: Marko Lahma

Quartz.NET JSON Serialization Support

Refit by: Paul Betts, Refit contributors

The automatic type-safe REST library for Xamarin and .NET

ReflectionBridge by: Stef Heyenrath

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

Quartz by: Marko Lahma

Quartz.NET Scheduling Framework for .NET Platform

Prism.Core by: Brian Lagunas, Dan Siegel

Prism is a fully open source version of the Prism guidance originally produced by Microsoft Patterns & Practices. Prism provides an implementation of a collection of design patterns that are helpful in writing well structured and maintainable XAML applications, including MVVM, dependency injection, commanding, event aggregation, and more. Prism's core functionality is a shared code base in a Portable Class Library targeting these platforms; WPF, and Xamarin Forms. Features that need to be platform specific are implemented in the respective libraries for the target platform.

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

Portable.BouncyCastle by: Claire Novotny

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

Remotion.Linq.EagerFetching by: rubicon IT GmbH

Allows LINQ providers based on re-linq Frontend to support eager fetching.

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.

RestSharp by: RestSharp Community

Simple REST and HTTP API Client

React.Core by: Daniel Lo Nigro

ReactJS and Babel tools for .NET. Important: This package does not do much on its own; you probably want an integration package (like React.Web.Mvc4) as well. Please refer to project site (http://reactjs.net/) for more details, usage examples and sample code.

Reloadify3000 by: James Clancey

Hot Reload plugin for Comet

protobuf-net by: Marc Gravell

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

Polly by: Michael Wolfenden, App vNext

Polly is a library that allows developers to express resilience and transient fault handling policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback in a fluent and thread-safe manner.

QRCoder by: Raffael Herrmann, Shane Krueger

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

RBush by: viceroypenguin

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

Radzen.Blazor by: Radzen Ltd.

Radzen Blazor is the most sophisticated free UI component library for Blazor, featuring 110+ native components including DataGrid, Scheduler, Charts, and advanced theming with full support for Material Design and Fluent UI.