Excellent “copy-pastable” lua library for html templating. The implementation is also nicely explained in this blog post.

An extensible templating language designed for writing prompts.

The APL programming language (a subset thereof) compiling to Common Lisp.

Sierra is an open-source framework for simplifying development of Java Swing applications. It provides a convenient DSL for declaratively constructing Swing component hierarchies.

JSON query and transformation language