QuantConnect.Lean.Engine by: QuantConnect.Lean.Engine

QuantConnect LEAN Engine: Engine Project - Core engine and datafeed implementation

QuantConnect.Logging by: QuantConnect.Logging

QuantConnect LEAN Engine: Logging Project - The logging library implementation

QuantConnect.Messaging by: QuantConnect Team and Community Contributors

QuantConnect LEAN Engine: Messaging Project - The external messaging system implementation

QuantConnect.pythonnet by: QuantConnect Python Team

QuantConnect PythonNET package

QuantConnect.Queues by: QuantConnect Team and Community Contributors

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 Scheduling Framework for .NET Platform

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

RawInput.Sharp by: mfakane

A simple wrapper library for Raw Input.

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