QuantConnect.Optimizer by: QuantConnect.Optimizer

QuantConnect LEAN Engine: Optimizer Project - The Lean optimization engine

QuantConnect.Optimizer.Launcher by: QuantConnect.Optimizer.Launcher

QuantConnect LEAN Engine: Optimizer Launcher Project - The Lean optimization engine launcher

QuantConnect.pythonnet by: Python.Runtime

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

QuantConnect.Queues by: QuantConnect.Queues

QuantConnect LEAN Engine: Queues Project - Handles and generates live and backtesting algorithm jobs

QuantConnect.Research by: QuantConnect.Research

QuantConnect LEAN Engine: Research Project - Core implementation for jupyter research environment

QuantConnect.ToolBox by: QuantConnect.ToolBox

QuantConnect LEAN Engine: ToolBox Project - A collection of data downloaders and converters

Quartz by: Marko Lahma, Quartz.NET

Quartz Scheduling Framework for .NET

Quartz.AspNetCore by: Lewis Zou, Marko Lahma, Quartz.NET

Quartz.NET ASP.NET Core integration; Quartz Scheduling Framework for .NET

Quartz.Extensions.DependencyInjection by: Marko Lahma, Quartz.NET

Folded into Quartz in 4.0: AddQuartz, QuartzOptions and the rest live in the Quartz package now. This package is empty and exists only so a grouped dependency update can move to 4.x - remove the reference, and see the migration guide.

Quartz.Extensions.Hosting by: Marko Lahma, Quartz.NET

Folded into Quartz in 4.0: AddQuartzHostedService, QuartzHostedService and QuartzHostedServiceOptions live in the Quartz package now. This package is empty and exists only so a grouped dependency update can move to 4.x - remove the reference, and see the migration guide.

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

Renamed to Quartz.Serialization.Newtonsoft in 4.0. This package is empty and exists only so a grouped dependency update can move to 4.x - reference Quartz.Serialization.Newtonsoft instead, and see the migration guide.

Quartz.Serialization.SystemTextJson by: Marko Lahma, Quartz.NET

Folded into Quartz in 4.0: the System.Text.Json job store serializer is built into the Quartz package and is the default. This package is empty and exists only so a grouped dependency update can move to 4.x - remove the reference, and see the migration guide.

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.

R.NET by: Kosei Abe, Jean-Michel Perraud

A .NET interoperability library to access the R statistical language runtime from .NET languages. The library is designed for fast data exchange, in process.

R.NET.Community by: Kosei Abe, Jean-Michel Perraud

Transitional package, you can remove and directly use nuget package ID R.NET

Radzen.Blazor by: Radzen Ltd.

Radzen Blazor is the most sophisticated free and open-source (MIT, including commercial use, with no license key, app limit or revenue limit) UI component library for Blazor, featuring 155+ native components including DataGrid, Scheduler, Gantt, PivotDataGrid, an Excel-like Spreadsheet with formulas and XLSX import/export, and 30+ chart types drawn in C# as SVG, the most complete AI toolkit for Blazor - AIChat with tool calling, approvals and attachments, AIPrompt, InlineAIPrompt and SmartPasteButton on Microsoft.Extensions.AI, working with any OpenAI-compatible provider - and free Material, Standard, Default, Humanistic and Software themes in light and dark.

RamlToOpenApiConverter.SourceOnly by: Stef Heyenrath

Source Code only project to convert RAML file to Open API Specification. Note that thisversion is compatible with Microsoft.OpenApi:3.10.2 and SharpYaml:2.1.5

RazorEngine by: Matthew Abbott, Ben Dornis

A templating engine built upon Microsoft's Razor parsing technology. RazorEngine allows you to use Razor syntax to build robust templates.

RazorMachine by: Jaap Lamfers

RazorMachine is a robust Razor 2.0/3.0 templating engine that supports layouts as well as a _viewStart construct like Asp.Net MVC

ReactiveUI by: .NET Foundation and Contributors

A MVVM framework that integrates with the Reactive Extensions for .NET to create elegant, testable User Interfaces that run on any mobile or desktop platform. This is the base package with the base platform implementations