hot

Install command: 
brew install --cask hot

Name: Hot

Menu bar application that displays the CPU speed limit due to thermal issues

https://github.com/macmade/Hot

Cask JSON API: /api/cask/hot.json

Cask code: hot.rb on GitHub

Current version: 1.9.4

Requirements: macOS >= 10.13

Analytics:

Installs (30 days)
hot 414
Installs (90 days)
hot 1,418
Installs (365 days)
hot 5,193