A toolbox language is a programming language that’s good at solving problems without requiring third party packages. My default toolbox languages are Python and shell scripts, which you probably already know about. Here are some of my more obscure ones.
AutoHotKey Had to show up! Autohotkey is basically “shell scripting for GUIs”. Just a fantastic tool to smooth over using unprogrammable applications. It’s Windows-only but similar things exist for Mac and Linux.