Dart is a client-optimized language for fast apps on any platform
- Optimized for UI: Develop with a programming language specialized around the needs of user interface creation.
- Productive: Make changes iteratively: use hot reload to see the result instantly in your running app.
- Fast on all platforms: Compile to ARM & x64 machine code for mobile, desktop, and backend. Or compile to JavaScript for the web.
https://github.com/dart-lang/sdk/blob/main/LICENSE
See also Flutter https://github.com/flutter/flutter