Flutter is an open-source UI toolkit for efficient cross-platform development. It allows users to create applications on the web, mobile, and desktop using one single codebase.

Flutter lets you build compiled, cross-platform mobile, desktop, and web applications from a single codebase. Get started with Flutter and its easy-to-use programming language, Dart.

Google to Microsoft: Help us bring Flutter apps to Windows 10, 10X and Surface Duo Google seeks "close collaboration" with Microsoft to improve Win32 and UWP support.