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

Xamarin.Forms is no longer supported. Migrate your apps to .NET MAUI.

UI automation library for .Net

Free and beautiful XAML template pages for Xamarin.Forms apps.

Create beautiful user interfaces for immersive VR/AR experiences.

UI system for MonoGame projects.

Avalonia XAML Preview for Linux and Windows

Microsoft Windows utility to manage the active window tracking/raising settings. This is known as x-mouse behavior or focus follows mouse on Unix and Linux systems.

This is a breadcrumb navigation control that is complete automatic and uses the Navigation stack and page titles to generate the breadcrumbs.

Dribbble designs as WPF user interface

Data binding for Unity gameobjects. If you like MVVM User Interfaces, this is where to start.

A Unity node editor for creating Immediate mode UIs

UI framework for MonoGame game engine.

Neural Action is a real-time CNN-based gaze tracking application providing human-machine interface to improve accessibility.

GUI-based and Open source ATRAC3 / ATRAC3+ / ATRAC9 Converter.

Desktop Agent for Windows

Tools to make Unity3D UI connections better.

A Wpf TextBox for entering a currency/numeric value

The Immersive Semi-Autonomous Aerial Command System is an open-source aerial vehicle command and control platform, designed for immersive interfaces (such as the Oculus Rift). This system provides an intuitive and seamless extension of human operators’ perception and control capabilities over the air, enabling a variety of research applications.

A little bit overkill toggle button UI for Unity Engine