R Alternatives

Groovy, or Apache Groovy is a object-oriented programming language for the JVM (Java Virtual Machine). Groovy share many similarities with programming languages like Python, Ruby, and Smalltalk while providing a syntax compatible with Java.

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Raku is a programming language that intends to carry forward the ideals of the Perl community. The project was formerly known as Perl 6 and was renamed to Raku as of October 2019. Raku introduces many modern concepts to the historical language while keeping Perl compatibility mode as a part of the specification. Raku is developed by an enthusiastic community of volunteers, that strive to push the language forward.

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Racket started its life as a Scheme implementation, but has now grown into a general-purpose, multi-paradigm programming language and the world's first ecosystem for language-oriented programming. Racket designed to be a platform for programming language design and implementation where developers can create their own dream language.

A family of programming languages dating back to 1958. Lisp is the second-oldest high-level programming language in widespread use today.

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Haxe is an open-source, high-level, cross-platform, multi-paradigm programming language and compiler. Haxe allows developers to build applications with a single code-base, that can be utilized on many different platforms. The compilers allow developers to build games, web, mobile, desktop, command-line and cross-platform APIs targeting JavaScript, C++, C#, Java, JVM, Python, Lua, PHP, Flash. Haxe is developed and managed by the Haxe Foundation and released fully free and open-source under the MIT license.

A free and open object-oriented programming language with a self-hosting compiler that generates C code. Vala uses the GObject system and is syntactically similar to C# while introducing unique features like functions, signals, properties, generics, assisted memory management, exception handling, type inference, and foreach statements. Vala makes it simple to target the GNOME stack and is also used for writing applications to the operating system elementary OS.

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Rebol is a lightweight, cross-platform data exchange programming language. The language is designed by Carl Sassenrath and is suited for network communications and distributed computing. Rebol's unique simplistic design makes it a productive language that is loved by its users.