Clojure

Clojure is a modern dialect of Lisp that is fully interoperable with the Java ecosystem. It retains Lisp's legendary expressive power and macro system for metaprogramming, while being pragmatically hosted on the JVM. This means you write concise, functional code but can directly use any Java class or library. It's particularly effective for data-centric applications, leveraging its rich set of immutable collections. Developers gain a unique combination of rapid development, profound abstraction capabilities, and access to enterprise-grade infrastructure.