Top C-SHARP GitHub Repositories & Tools (2026)

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

Quartz Enterprise Scheduler .NET

Orchard Core is an open-source modular and multi-tenant application framework built with ASP.NET Core, and a content management system (CMS) built on top of that framework.

Open-source platform for building cross-platform native Mobile, Web, Desktop, and Embedded apps from a single C#/XAML codebase. Work from any IDE/CLI with Hot Reload, Visual Designer, MCPs, and Skills built for modern .NET workflows. 200M+ NuGet downloads.

Horton is the simple database migration utility.

A GTK# GUI calculator written in C#. Supports exponentiation and parentheses, follows PEMDAS. Developed with MonoDevelop.

Cross-platform video editing (compositing) software.

NUnit Framework

☕️⚡️TShock provides Terraria servers with server-side characters, anti-cheat, and community management tools.

Distributed Application Framework for .NET

ASP.NET Boilerplate - Web Application Framework

EF Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations.