Kotlin is described as 'Cross-platform, statically typed, general-purpose programming language with type inference. Kotlin is designed to interoperate fully with Java, and the JVM version of its standard library depends on the Java Class Library, but type inference allows its syntax to be' and is a programming language in the development category. There are more than 50 alternatives to Kotlin for a variety of platforms, including Mac, Windows, Linux, BSD and Web-based apps. The best Kotlin alternative is Python, which is both free and Open Source. Other great apps like Kotlin are JavaScript, Java, C# and Lua.
Builds all the cruft that you normally have to build yourself with Java