A cross-platform UI framework for .NET
An advanced, composable, functional reactive model-view-viewmodel
UI Automation Framework for Games and Apps
Web and Mobile framework
Free and Open Source UI Kit for Bootstrap 4, React, Vue.js,etc.
A small C library for building user interfaces with C, XML and CSS
Admin dashboard template built with Bootstrap 4, elegant UI themes
PHP bindings for the cross-platform GUI library wxWidgets.
Object-oriented RAD framework for Turbo Pascal 7.0
Toolkit for rapid XML and web application development
Apache Cayenne, Wicket, CXF, GWT, EJB examples as a framework