DBeaver: use a consistent interface for practically any data story. Wanna SELECT and JOIN CSVs? It can do that too.

https://www.mail-tester.com/ - Fantastic email server settings troubleshooter.

Excel / Calc / Gnumeric: I don't even know macros, just the functions, sorting, filtering, and pivot tables enable good productivity. And sometimes fun, I chose my current video card, and optimized my Factorio gameplay with Calc.

BASH, jq, sed, grep, tr, cut, Geany, regexes: it's fantastic to be able to work with text. Log parsing and other text tasks turn into a puzzle game, where I win fast, and it's usually faster than to use anything else, especially for one-offs.