Some alternatives to React Native that don’t use JavaScript are:

1. Flutter: A UI toolkit developed by Google that uses the Dart programming language. Flutter allows you to build native-looking applications for multiple platforms, including iOS, Android, and the web.
2. Xamarin: A cross-platform development framework owned by Microsoft. It enables building native applications using C# and .NET, supporting iOS, Android, and Windows platforms.
3. NativeScript: An open-source framework that uses JavaScript or TypeScript to build native mobile applications. It supports multiple platforms, including iOS and Android, and allows access to native APIs and UI components.
4. Kotlin Multiplatform: Kotlin Multiplatform Mobile (KMM) is a framework developed by JetBrains that enables code sharing between Android and iOS using the Kotlin programming language. It allows developers to write shared business logic and UI components while still providing access to platform-specific APIs.
5. SwiftUI: A framework developed by Apple that uses the Swift programming language. It allows developers to build native applications for iOS, macOS, watchOS, and tvOS. SwiftUI provides a declarative syntax for creating user interfaces and offers a lot of built-in functionality.

These alternatives offer different approaches to cross-platform development, leveraging various programming languages and frameworks. Each has its own advantages and considerations, so it’s important to evaluate them based on your specific requirements and preferences.