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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.

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.

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.

A Microsoft developed domain-specific programming language used for expressing quantum algorithms. Q# share similar structures and elements with popular languages like Python, C#, and F#. The language comes bundled with the QDK (Quantum Development Kit) and quantum simulators, while also being extensible with Q# libraries. With Q# developers can build quantum algorithms used for quantum computing with a basic procedural model for writing programs with loops, if/then statements, and common data types.

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A free and open general-purpose, object-oriented programming language developed by Ary Borenszweig, Juan Wajnerman, Brian Cardiff and a community with over 300 contributors. Crystal is statically type checked, which means that all code errors will be caught at compile time, rather than fail on runtime. Crystal provides an easy-to-learn syntax similar to Ruby, while at the same time producing performance similar to that of the programming language C.