.NET MAUI is the .NET Multi-platform App UI, a framework for building native device applications spanning mobile, tablet, and desktop.

Stride (formerly Xenko), a free and open-source cross-platform C# game engine.

Flax Engine – multi-platform 3D game engine

Murder is a pixel art ECS game engine.

A multi-platform data driven 2D diagram editor.

A docking layout system.

Port of Windows UWP Xaml Behaviors for Avalonia Xaml.

Pan and zoom control for Avalonia.

AvaloniaUI control that provides a simple way to display a dialog with information or prompt the user when information is needed

Syncfusion Toolkit for .NET MAUI offers high-quality UI controls to help you build rich, high-performance applications for iOS, Android, macOS, and Windows from a single codebase

Reactive undo/redo framework for .NET.

Theme manager for Avalonia applications.

Sample Dock application.

A closs-platform generic gameengine built on C#/.NET 6

Xamarin Forms platform implemented with Avalonia (A multi-platform .NET UI framework)

[W]in[P]hone 7-8 Apps [R]unner. Win10 Desktop/Android only (Avalonia-based project)

A Windows 10 (including Mobile) Music player that downloads your Music from OneDrive and Syncs your Playlists between devices.

Library to render to the terminal using C# and .NET

Stride GameStudio running on Avalonia UI

touch screen kiosk with multi-platform remote control web server using blazor and net9