Flutter

Also known as:

flutterflutter-frameworkflutter-app

/ˈflʌtər/

A UI toolkit for building natively compiled applications for mobile, web, and desktop

Details

Flutter is Google's UI toolkit for building beautiful, natively compiled applications.
It allows developers to write one codebase that runs on iOS, Android, web, and desktop.
Flutter uses the Dart programming language and provides a rich set of pre-built widgets.