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Top 23 C# C# Projects
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Project mention: Shadowsocks-Windows: A Fast, Secure C# Port of Shadowsocks for Windows | news.ycombinator.com | 2024-10-01
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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Avalonia
Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The most popular .NET UI client technology
Project mention: Most (ly Dead) Influential Programming Languages (2020) | news.ycombinator.com | 2025-07-16C# with Avalonia is pretty good for cross platform development:
https://avaloniaui.net/
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ILSpy
.NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!
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Entity Framework
EF Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations.
Project mention: Mastering EF Core Interceptors: Hook into the Pipeline with the Decorator Pattern | dev.to | 2025-04-19EF Core GitHub Repository
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ABP
Open-source web application framework for ASP.NET Core! Offers an opinionated architecture to build enterprise software solutions with best practices on top of the .NET. Provides the fundamental infrastructure, cross-cutting-concern implementations, startup templates, application modules, UI themes, tooling and documentation.
Project mention: Most Popular .NET Domain-Driven Design (DDD) Resources: Top 5 GitHub Repositories, Frameworks & Templates in 2025 | dev.to | 2025-06-03Main Repository: github.com/abpframework/abp
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Stream
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
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MonoGame: https://www.monogame.net/
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ArchiSteamFarm
C# application with primary purpose of farming Steam cards from multiple accounts simultaneously.
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The name of the library is BenchmarkDotNet and the documentation can be found here. The only thing you have to do is:
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Project mention: Is Using Linux for Web Development Actually Necessary? Short answer: No. | dev.to | 2025-05-24
Package managers – With tools like Scoop or Chocolatey, installing dev tools on Windows feels almost like using apt or brew.
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mRemoteNG
mRemoteNG is the next generation of mRemote, open source, tabbed, multi-protocol, remote connections manager.
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MahApps.Metro
A framework that allows developers to cobble together a better UI for their own WPF applications with minimal effort.
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Uno Platform
Open-source platform for building cross-platform native Mobile, Web, Desktop and Embedded apps quickly. Create rich, C#/XAML, single-codebase apps from any IDE. Hot Reload included! 90m+ NuGet Downloads!!
Project mention: Ask HN: Why don't browsers load websites directly in WASM? | news.ycombinator.com | 2025-07-08 -
Bogus
:card_index: A simple fake data generator for C#, F#, and VB.NET. Based on and ported from the famed faker.js.
Project mention: Why I moved from AutoFixture to Bogus for test data generation for C#/xUnit tests | dev.to | 2025-07-05AutoFixture and Bogus are both well-known libraries for generating test data in C# tests. AutoFixture is, well, dated whereas Bogus is state of the art.
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Project mention: Why I'm Learning C# and .NET After Two Decades of Programming | news.ycombinator.com | 2025-03-01
Yes, it can, and by default be through SignalR. The problem is both SignalR has its own limitations as well as web-sockets in general.
I have never seen a SignalR (and recently Blazor) implementation with significant and characteristic issues the moment you actually star to observe end-user errors/issue/anatomies. Either through automated reporting or user feedback. And this is because SignalR is built on .NET and .NET has many different threading issues when you need those thread to be stable and robust (not talking about transit B2B apps)
It always happens. Without exception.
You do not have to take my word through it, look at the active, open, and historical issues here: https://github.com/SignalR/SignalR/issues
It's absurd. And it only survives because it's Microsoft.
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Refit
The automatic type-safe REST library for .NET Core, Xamarin and .NET. Heavily inspired by Square's Retrofit library, Refit turns your REST API into a live interface.
I really love using Refit library for communication with other services via HTTP protocol. This library provides an interface wrapper (with code generation) that wraps HttpClient using HttpClientFactory.
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StockSharp
Algorithmic trading and quantitative trading open source platform to develop trading robots (stock markets, forex, crypto, bitcoins, and options).
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SaaSHub
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
C# C# discussion
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Index
What are some of the best open-source C# projects in C#? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | shadowsocks-windows | 58,910 |
| 2 | Avalonia | 28,138 |
| 3 | ILSpy | 23,274 |
| 4 | MaterialDesignInXamlToolkit | 15,695 |
| 5 | Entity Framework | 14,210 |
| 6 | ABP | 13,618 |
| 7 | Duplicati | 12,853 |
| 8 | MonoGame | 12,299 |
| 9 | ArchiSteamFarm | 12,230 |
| 10 | ASP.NET Boilerplate | 11,940 |
| 11 | Lean | 11,758 |
| 12 | Json.NET | 11,094 |
| 13 | BenchmarkDotNet | 11,061 |
| 14 | Chocolatey | 10,897 |
| 15 | CefSharp | 10,075 |
| 16 | mRemoteNG | 9,915 |
| 17 | MahApps.Metro | 9,636 |
| 18 | Uno Platform | 9,505 |
| 19 | Bogus | 9,334 |
| 20 | SignalR | 9,292 |
| 21 | Refit | 9,131 |
| 22 | imewlconverter | 8,712 |
| 23 | StockSharp | 8,284 |
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