Apache Cordova - Platform for building native mobile applications using HTML, CSS and JavaScript
RubyMotion - Write cross-platform native apps in Ruby
Qt Creator - Qt Creator is a cross-platform C++, JavaScript and QML integrated development environment. It is the fastest, easiest and most fun experience a C++ developer could wish for.
Flutter - Build beautiful native apps in record time 🚀
B4X - Cross platform development tools for native iOS, Android, desktop and server applications.
Capacitor by Ionic - An open source native runtime that makes it easy to build cross-platform apps that run equally well on iOS, Android, and the Web.