WinUI

vs

OpenUserCSS

Qt includes everything you need to build cross-platform applications that run on various software and hardware platforms such as Linux, Windows, macOS, Android or embedded systems with little to no change in the underlying codebase. Qt is released open-source under the GNU Free Documentation License, and provides a commerical offering for enterprises.

Electron is a framework that lets you build cross-platform desktop apps with JavaScript, HTML, and CSS. It takes care of the hard parts of building native software, so that you can focus on the core purpose of your application.

Vaadin is an open-source framework for web application development. The framework allows you to write UI 100% in Java without having to write extra HTML, CSS and JS. Vaadin apps run on the server and handle all communication automatically and securely.

A modern responsive front-end framework based on Material Design. With Materialize CSS you can speedup your design and development process as most of the heavy lifting is done for you with default stylings that incorporate custom components. All principles of Material Design is incorporated into the framework and can be easily utilized with components and animations that provide better feedback to the users of your websites and applications.

A free and open-source HTML and CSS framework dedicated to responsive and mobile-first frontend web development. With Bootstrap developers can get up and running fast without writing boilerplate HTML and CSS. Bootstrap comes packed with design templates and standards for buttons, forms, navigation, typography and interface components. The framework also provides extra interactive JavaScript extensions written specifically for Bootstrap.

Charts.css is a modern CSS data visualization framework. It utilizes CSS utility classes to style HTML elements as charts. Allowing developers to build interactive charts and data visualization components with CSS instead of JavaScript.