TypeStrong/ts-node: TypeScript execution and REPL for node.js
Useful-looking tool that makes TypeScript usable on the command line, amongst other things.
Dune Shell
Dune is a shell designed for powerful scripting. Think of it as an unholy combination of bash and Lisp.
pip.wtf: Inline dependencies for small Python scripts
A tool to include dependencies with a Python script, without the packaging faff. Not sure I need it, not even sure I want it, but damn do I love how it's written up and introduced. I feel the annoyance.
macOS defaults list
Lots of useful information about the macOS defaults command.
Conventions for Command Line Options
Excellent blog post about the conventions normally used for CLI options; and also why Python's argument parser gets it wrong.
Colorize your CLI
Blog post that documents some different ways, and some useful tools, for giving more colour to the CLI.