Top Alternatives to Groovy

JavaScript is a versatile, high-level programming language primarily used for creating dynamic and interactive web content. It runs directly in web browsers and is a fundamental technology alongside HTML and CSS.

Ruby is a dynamic, open-source programming language known for its elegant syntax and focus on developer productivity. It's widely used for web development, scripting, and rapid prototyping.

C# is a versatile, modern, object-oriented programming language from Microsoft. It's widely used for developing Windows applications, web services, mobile apps, and games, offering a balance of power and ease of use.

Lua is a powerful, fast, and lightweight scripting language designed for embedding in applications. It's known for its simplicity, portability, and efficiency, making it ideal for a wide range of uses from embedded systems to game development and configuration.

Dart is an open-source, client-optimized programming language for building fast apps on any platform. It offers a productive development experience and high performance.

D is a general-purpose systems and application programming language that aims to combine the power and high performance of C++ with the productivity and safety of modern languages like Python or Ruby.

Objective-C was a robust, general-purpose, object-oriented programming language primarily used for Apple's macOS and iOS operating systems. It combined C's power with Smalltalk's dynamic messaging capabilities.

Swift is a powerful and intuitive compiled programming language from Apple, building on the best of C and Objective-C without the constraints of C compatibility. It's designed for safety, performance, and modern software design patterns, enabling developers to create apps for iOS, macOS, watchOS, tvOS, and beyond.

FreeBASIC is a free and open-source multiplatform BASIC compiler. It supports a wide range of operating systems including Windows, Linux, and macOS (via third-party ports), facilitating cross-platform development. It's designed to be highly compatible with QuickBASIC while offering numerous modern features like object-oriented programming, manual memory management, and support for graphics and sound libraries, making it suitable for various programming tasks from system utilities to game development.

JRuby is a robust implementation of the Ruby programming language built on the Java Virtual Machine (JVM). It provides seamless interoperability between Ruby and Java, allowing developers to leverage the strengths of both ecosystems.

REBOL is a lightweight, cross-platform language designed for data exchange, networking, and distributed computing. It's known for its expressive syntax and focus on dialects for various tasks, making it suitable for scripting and building domain-specific applications.

F# is an open-source, cross-platform, functional-first programming language designed for conciseness and correctness. It integrates seamlessly with the .NET ecosystem, making it ideal for data science, web development, and more.

Kotlin is a modern, statically-typed programming language developed by JetBrains. It runs on the Java Virtual Machine (JVM), Android, and the web (via JavaScript), and can compile to native code. Designed for concise, safe, and interoperable code, Kotlin aims to make programming more enjoyable and productive.

Nim is a modern, statically typed, compiled programming language emphasizing efficiency, expressiveness, and flexibility. It draws inspiration from languages like Python, Pascal, and C++, making it approachable for developers while offering low-level control for systems programming.

Squirrel is a high-level, imperative and object-oriented programming language designed for embedding in applications.