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Top 23 C# GUI Projects
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Avalonia
Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The future of .NET UI
> I like WASM and I want to like WASM but the rate of maturity within the ecosystem is incredibly abysmal.
The C# toolchain for WebAssembly is pretty good. You can do a lot with Avalonia and Uno:
https://avaloniaui.net/
https://platform.uno/
Here's a C# clone of Visual Basic compiled to WebAssembly:
https://bandysc.github.io/AvaloniaVisualBasic6/
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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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Project mention: SourceGit: Open-Source Git UI for Windows/macOS/Linux | news.ycombinator.com | 2025-12-26
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SophiApp
:zap: The most powerful open source tweaker on GitHub for fine-tuning Windows 10 & Windows 11
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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YoutubePlaylistDownloader
A tool to download whole playlists, channels or single videos from youtube and also optionally convert them to almost any format you would like
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Ooui
A small cross-platform UI library that brings the simplicity of native UI development to the web
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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# GUI discussion
C# GUI related posts
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Porting a SwiftUI App to Avalonia: How does Cross-Platform .NET hold up
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I Hate: Programming Wayland Applications
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Flameshot
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SourceGit: Open-Source Git UI for Windows/macOS/Linux
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TUI Implementation for Avalonia UI
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Most (ly Dead) Influential Programming Languages (2020)
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Ask HN: Why don't browsers load websites directly in WASM?
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A note from our sponsor - ReSharper
www.jetbrains.com | 6 Jun 2026
Index
What are some of the best open-source GUI projects in C#? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Avalonia | 30,928 |
| 2 | MaterialDesignInXamlToolkit | 16,169 |
| 3 | MahApps.Metro | 9,796 |
| 4 | HandyControl | 7,083 |
| 5 | sourcegit | 5,338 |
| 6 | mpv.net | 5,100 |
| 7 | SophiApp | 4,991 |
| 8 | Eto.Forms | 3,940 |
| 9 | PicView | 3,267 |
| 10 | GARbro | 3,039 |
| 11 | MaterialSkin | 3,036 |
| 12 | FlaUI | 2,984 |
| 13 | YoutubePlaylistDownloader | 2,945 |
| 14 | Fluent.Ribbon | 2,750 |
| 15 | SpleeterGui | 2,723 |
| 16 | Dragablz | 2,318 |
| 17 | AvalonEdit | 2,060 |
| 18 | DockPanelSuite | 1,863 |
| 19 | AdonisUI | 1,861 |
| 20 | ChocolateyGUI | 1,801 |
| 21 | Axiom | 1,693 |
| 22 | Ooui | 1,620 |
| 23 | Dock | 1,422 |
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ReSharper brings a professional toolset for C# developers backed by over 20 years of experience, enterprise-grade security, SOC 2 compliance, and the trust of companies worldwide.
www.jetbrains.com