SaaSHub helps you find the best software and product alternatives Learn more →
Top 23 C# C# Projects
-
I installed Jellyfin on my home server a few months ago but it’s already broken by upgrading to 10.11, and unusable until I restore 10.10 from backup or start over: https://github.com/jellyfin/jellyfin/issues/15027. There seem to be lots of other database migration bugs for this release and other ones.
-
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.
- Project mention: My PC Cries Every Morning, But These 8 Startup Apps Are Worth It | dev.to | 2025-11-12
Files: File Explorer's Cooler, Younger Sibling
-
ShareX
ShareX is a free and open-source application that enables users to capture or record any area of their screen with a single keystroke. It also supports uploading images, text, and various file types to a wide range of destinations.
Project mention: Windhawk Windows classic theme mod for Windows 11 | news.ycombinator.com | 2025-11-15I've been using the open source ShareX screenshot tool: https://getsharex.com/
- Project mention: Show HN: Ut – Rust based CLI utilities for devs and IT | news.ycombinator.com | 2025-10-05
-
Avalonia
Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The most popular .NET UI client technology
Project mention: The .NET Cross-Platform Showdown: MAUI vs Uno vs Avalonia (And Why Avalonia Won) | dev.to | 2025-12-22If you're building cross-platform .NET applications, give Avalonia a serious look. It's what MAUI should have been.
-
WaveFunctionCollapse
Bitmap & tilemap generation from a single example with the help of ideas from quantum mechanics
This is very cool. I wonder how well it could work with Wave Function Collapse (or the Nested variant)
[1] https://github.com/mxgmn/WaveFunctionCollapse
[2] https://nyh-dolphin.github.io/en/research/n_wfc/
-
-
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.
-
awesome-dotnet-core
:honeybee: A collection of awesome .NET core libraries, tools, frameworks and software
-
Roslyn
The Roslyn .NET compiler provides C# and Visual Basic languages with rich code analysis APIs.
Project mention: .NET 10 Preview 6 brings JIT improvements, one-shot tool execution | news.ycombinator.com | 2025-07-30Yes it is. you can fork the roslyn compiler and toolchain here: https://github.com/dotnet/roslyn It's even an mit license one of the most permissive.
-
-
CleanArchitecture
Clean Architecture Solution Template: A proven Clean Architecture Template for ASP.NET Core 10 (by ardalis)
-
lively
Free and open-source software that allows users to set animated desktop wallpapers and screensavers powered by WinUI 3.
-
Don’t try to remember them all. Use a password manager. It stores your passwords safely. Some good ones are Bitwarden, LastPass, and 1Password.
-
OpenRA
Open Source real-time strategy game engine for early Westwood games such as Command & Conquer: Red Alert written in C# using SDL and OpenGL. Runs on Windows, Linux, *BSD and Mac OS X.
Project mention: Ask HN: Which Do you know any open source games? | news.ycombinator.com | 2025-08-10 -
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.
I wanted to find a framework that already had all the Boiler code needed for a business application: menus, sections, graphs, users, etc. While searching for such a framework, we noticed the .Net frameworks https://aspnetboilerplate.com and https://abp.io, which already have a lot of things "out of the box". As far as I understand, both frameworks are being developed either by related teams, or even by one team. And the teams are from Turkey. The ASP.NET Boilerplate framework has legacy code from older versions of the .Net Framework. The newer ABP framework does not have legacy, it is on .Net Core. Both frameworks have a decent number of stars on github.
-
winsw
A wrapper executable that can run any executable as a Windows service, in a permissive license.
- Project mention: .NET 10 Preview 6 brings JIT improvements, one-shot tool execution | news.ycombinator.com | 2025-07-30
-
ArchiSteamFarm
C# application with primary purpose of farming Steam cards from multiple accounts simultaneously.
Project mention: Exploring the tragedy of the Counter-Strike 2 server browser | news.ycombinator.com | 2025-08-25I'd heard of https://github.com/JustArchiNET/ArchiSteamFarm for Steam cards but not CS2 drops.
- Project mention: What's New in C# 14: Null-Conditional Assignments | news.ycombinator.com | 2025-09-17
Hi there. C# lang designer here :)
Discriminated unions continue to be worked on, and you can see our latest designs here: https://github.com/dotnet/csharplang/blob/main/proposals/uni...
The space there is large and complex, and we have a large amount of resources devoted to it. There was no way that `a?.b = c` was going to change if/when unions come to the language.
For unions, nothing has actually been delayed. We continue working hard on it, and we'll release it when we think it's suitable and ready for the future of the lang.
The only feature that actually did get delayed was 'dictionary expressions' (one that i'm working). But that will hopefully be in C# 15 to fill out the collection-expression space.
-
Playnite
Video game library manager with support for wide range of 3rd party libraries and game emulation support, providing one unified interface for your games.
Project mention: Show HN: RomM – An open-source, self-hosted ROM manager and player | news.ycombinator.com | 2025-06-11Ideally you would use both, and the community would build integrations that allow, say, EmuDeck to pull games from the server onto your Steam Deck and sync saves back to the server.
I usually play on Windows with Playnite (https://playnite.link/), and the plugin (https://github.com/rommapp/playnite-plugin) allows Playnite to pull and display the list of games for each system, after which I can install the ones I want to play onto my PC.
-
I wanted to find a framework that already had all the Boiler code needed for a business application: menus, sections, graphs, users, etc. While searching for such a framework, we noticed the .Net frameworks https://aspnetboilerplate.com and https://abp.io, which already have a lot of things "out of the box". As far as I understand, both frameworks are being developed either by related teams, or even by one team. And the teams are from Turkey. The ASP.NET Boilerplate framework has legacy code from older versions of the .Net Framework. The newer ABP framework does not have legacy, it is on .Net Core. Both frameworks have a decent number of stars on github.
- Project mention: .NET 10 Preview 6 brings JIT improvements, one-shot tool execution | news.ycombinator.com | 2025-07-30
- Project mention: The Windows Subsystem for Linux is now open source | news.ycombinator.com | 2025-05-19
> whereas Microsoft is actively sabotaging wine
Do you have a link to where I can read more about this? My understanding is that Microsoft saw Wine as inconsequential to their business, even offloading the Mono runtime to them [1] when they dropped support for it.
[1] https://www.mono-project.com/
-
SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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
C# C# related posts
-
We Killed the Monster: WebForms Core 2.0 Released and the End of the Front-end Era of Terror
-
Why I Built Yet Another Mediator (And Why You Might Care)
-
Docfx-Plus: A template and a tool to enhance DocFx and migrate from SHFB (Sandcastle)
-
GSWT: Gaussian Splatting Wang Tiles
-
TaskHub – Update
-
How to reduce on-call friction using AI Voice Agent
-
How to Build a WinForms Document Scanner in .NET: TWAIN, Webcam & PDF Export
- A note from our sponsor - SaaSHub www.saashub.com | 24 Dec 2025
Index
What are some of the best open-source C# projects in C#? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Jellyfin | 46,766 |
| 2 | Files | 40,786 |
| 3 | ShareX | 34,873 |
| 4 | DevToys | 30,600 |
| 5 | Avalonia | 29,570 |
| 6 | WaveFunctionCollapse | 24,513 |
| 7 | SteamTools | 24,056 |
| 8 | awesome-dotnet-core | 20,967 |
| 9 | Roslyn | 20,086 |
| 10 | PEASS-ng | 18,955 |
| 11 | CleanArchitecture | 17,844 |
| 12 | lively | 17,787 |
| 13 | Bitwarden | 17,674 |
| 14 | OpenRA | 16,229 |
| 15 | ABP | 14,046 |
| 16 | winsw | 13,337 |
| 17 | MonoGame | 12,797 |
| 18 | ArchiSteamFarm | 12,742 |
| 19 | csharplang | 12,417 |
| 20 | Playnite | 12,083 |
| 21 | ASP.NET Boilerplate | 11,985 |
| 22 | ImageGlass | 11,834 |
| 23 | Mono | 11,400 |
Sponsored
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.
www.influxdata.com