What developer tool do you use daily that still feels underrated?

I feel like every dev tool discussion ends up being the same 5 names over and over.

But the stuff that actually saves me time is usually some tiny tool I randomly found through a comment, a GitHub issue, or someone’s blog from 4 years ago.

Curious what you all use daily that does not get talked about much. Could be a CLI tool, browser extension, VS Code extension, API tool, debugging helper, anything really.

Not asking for the most popular tool, more like the thing where you think “why does nobody talk about this?”