All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).

Font introspection, complex text shaping and glyph rendering.

Quartz Enterprise Scheduler .NET

High performance in-memory/distributed messaging pipeline for .NET and Unity.

A SMTP Server component written in C#

A library of high-quality primitives that extend SolidJS reactivity.

Open-Source, Small and Low-Cost Wireless Dongle based on the nRF52840 Multiprotocol SoC, featuring Bluetooth Low Energy, Bluetooth mesh, Thread, Zigbee and 2.4 GHz, and Multi-Tool Device for IoT

Generate and edit PDF documents in your .NET applications using the open-source QuestPDF library and its C# Fluent API. Build invoices, reports and data exports with ease.

A declarative, efficient, and flexible JavaScript library for building user interfaces.

Flexible and versatile OAuth 2.0/OpenID Connect stack for .NET

🏗 The AKEless Build System for C#/.NET

OpenID Connect (OIDC) and OAuth2 protocol support for browser-based JavaScript applications

A slideout navigation control for Xamarin.iOS

Superseded by https://github.com/japaric/cortex-m-quickstart

📗 SheetJS Spreadsheet Data Toolkit -- New home https://git.sheetjs.com/SheetJS/sheetjs

Visual Studio Code

A cross-platform .NET library for IMAP, POP3, and SMTP.

.NET Plotting library written in C#. Fork of the NPlot library.

A .NET MIME creation and parser library with support for S/MIME, PGP, DKIM, TNEF and Unix mbox spools.

Json.NET is a popular high-performance JSON framework for .NET

Npgsql is the .NET data provider for PostgreSQL.

Please file issues or pull requests here: https://github.com/dotnet/fsharp

Mono open source ECMA CLI, C# and .NET implementation.

MonoDevelop is a cross platform .NET IDE