Apache Cordova - Platform for building native mobile applications using HTML, CSS and JavaScript
wxWidgets - wxWidgets: Cross-Platform GUI Library
React Native - A framework for building native apps with React
Electron - Build cross platform desktop apps with web technologies
PhoneGap - Easily create apps using the web technologies you know and love: HTML, CSS, and JavaScript.
GTK - GTK+ is a multi-platform toolkit for creating graphical user interfaces.