Sweatpea is a little green pea that lives in your Mac's menu bar and reacts to how hard your Mac is working. Chill, warm, sweating, meltdown. Click it and it names the app responsible, explains macOS processes in plain English, and offers a polite Quit. It also tracks memory and storage, and asks you to take a two-minute break every hour. About 1% of one core. No account, no analytics. Free, with Pro at $9.99 once.