The D2 Tour article introduces D2, a diagram scripting language that allows users to create diagrams by describing them in text. It provides a quick start guide for using the command-line interface (CLI) and includes a cheat sheet for reference. Users can experiment with code snippets directly in the Playground feature of the documentation.

Wren is a lightweight, class-based concurrent scripting language designed for ease of embedding in applications. It features a fast single-pass compiler, a compact object representation, and is built around an accessible C API, making it a practical choice for developers. With a familiar modern syntax, Wren aims to simplify and enhance the scripting experience.