Flutter

React Native is an open-source framework for building native applications with React. JavaScript components, declarative UI, hooks, and Suspense are rendered through native platform UI on Android, iOS, and other platforms, while Fast Refresh applies JavaScript changes without rebuilding the native app. Native Modules allow JavaScript code to call platform code directly, and the framework can be adopted incrementally in existing applications or used with production frameworks such as Expo. React Native is developed by companies and individual core contributors and is distributed under the MIT license.

Electron is an open-source framework for building cross-platform desktop applications with JavaScript, HTML, and CSS. It is built on Node.js and Chromium, provides binaries for macOS, Windows, and Linux, and is used by applications such as Visual Studio Code. The project is MIT-licensed, maintained under the OpenJS Foundation, and distributed via npm.

Native SDK is an open-source toolkit for building native desktop applications. It uses declarative markup in `.native` files for views, plain TypeScript compiled to native code at build time or Zig for application logic, and an engine that renders directly into real operating-system windows without a browser, WebView, or JavaScript runtime in the application binary. The CLI can scaffold, run, check, and build applications, with live view updates during development and an optimized release-binary build. Its component catalog includes controls such as buttons, tabs, text fields, dialogs, charts, and virtual lists, while styling is organized around replaceable design tokens. The toolkit also includes an embedded automation server for agents.

Kotlin is a concise, multiplatform programming language developed by JetBrains. It is used to build backend, mobile, web, and desktop applications, including native Android applications, and supports object-oriented and functional programming, asynchronous code, and null safety. Kotlin Multiplatform lets developers share code across platforms such as Android, iOS, macOS, Windows, Linux, and watchOS while retaining platform-specific code where needed. Kotlin is included with current versions of IntelliJ IDEA and Android Studio.