QuantConnect.Api by: QuantConnect Team and Community Contributors

QuantConnect LEAN Engine: API Project - C# SDK for interaction with the QuantConnect.com

QuantConnect.Brokerages by: QuantConnect.Brokerages

QuantConnect LEAN Engine: Brokerages Project - A collection of brokerages for live trading and backtesting

QuantConnect.Common by: QuantConnect.Common

QuantConnect LEAN Engine: Common Project - A collection of common definitions and utils

QuantConnect.Compression by: QuantConnect Team and Community Contributors

QuantConnect LEAN Engine: Compression Project - A library with compression tools

QuantConnect.IBAutomater by: QuantConnect Corp.

QuantConnect IBAutomater package

QuantConnect.Indicators by: QuantConnect.Indicators

QuantConnect LEAN Engine: Indicators Project - A collection of financial indicators

QuantConnect.Lean by: QuantConnect Team and Community Contributors

QuantConnect LEAN Engine: Launcher Project - Main startup executable for live and backtesting

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.

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.