C Sharp GitHub Repositories (2026) · Open Source Tools

Lean Algorithmic Trading Engine by QuantConnect (Python, C#)

.NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!

Nucleus Co-op is an application that starts multiple instances of a game for split-screen multiplayer gaming!

Mission Planner Ground Control Station for ArduPilot (c# .net)

Google's Material Design in XAML & WPF, for C# & VB.Net.

Re-implementation of The Sims Online.

C# application with primary purpose of farming Steam cards from multiple accounts simultaneously.

Npgsql is the .NET data provider for PostgreSQL.

XNA / MonoGame based client for playing classic Command & Conquer games both online and offline with a CnCNet game spawner.

RMC-14 is an asymmetric PvP game that runs on Robust Toolbox.

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

Distributed Application Framework for .NET

mRemoteNG is the next generation of mRemote, open source, tabbed, multi-protocol, remote connections manager.

Fluent mapping for Dapper, with conventions, immutable object materialization, analyzers, source generators, DI integration, and Dommel support.

Official C# support for Visual Studio Code

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

Cross-platform 2D game engine focused on ultimate productivity built in .NET

Shoko is a media metadata aggregator that solves all of the annoying edge cases that face anime's differing structure from western media. It integrates directly with media software rather than working around things like nfo files or naming conventions.

WPF GUI for youtube-dl and yt-dlp.

:cake: Cake (C# Make) is a cross platform build automation system.