QuantConnect.Logging by: QuantConnect.Logging

QuantConnect LEAN Engine: Logging Project - The logging library implementation

QuantConnect.Messaging by: QuantConnect.Messaging

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

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.NET job scheduler - cron, calendar and interval triggers, clustering over a persistent job store, and Microsoft.Extensions hosting, logging, options and dependency injection throughout. The core package: everything else builds on this one.

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

Quartz.NET ASP.NET Core integration - the HTTP API a remote scheduler is driven through, and the health check endpoint; 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.Jobs by: Marko Lahma, Quartz.NET

Quartz.NET Jobs - the jobs that ship ready to schedule: directory and file scanning, sending mail, and running a native process; Quartz Scheduling Framework for .NET

Quartz.Plugins by: Marko Lahma, Quartz.NET

Quartz.NET Plugins - a schedule declared in XML or JSON and reloaded as the file changes, and job and trigger history logging; Quartz Scheduling Framework for .NET

Quartz.Plugins.TimeZoneConverter by: Sean Farrow, Marko Lahma, Quartz.NET

Quartz.NET TimeZoneConverter integration - resolves a trigger's time zone by either its IANA or its Windows id, on either operating system, through https://github.com/mj1856/TimeZoneConverter; Quartz Scheduling Framework for .NET

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.Newtonsoft by: Marko Lahma, Quartz.NET

Quartz.NET Json.NET serialization - the job store serializer for a database already holding Newtonsoft.Json's output. New applications use the System.Text.Json one built into Quartz; Quartz Scheduling Framework for .NET

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.

QuickGraph by: Jonathan Peli de Halleux

QuickGraph provides generic directed/undirected graph datastructures and algorithms for .Net, Silverlight, Windows Phone and Win 8. QuickGraph comes with algorithms such as depth first seach, breath first search, A* search, shortest path, k-shortest path, maximum flow, minimum spanning tree, least common ancestors, etc...