brightness

Install command: 
brew install --cask brightness

Name: Brightness

http://bergdesign.com/brightness/

/api/cask/brightness.json (JSON API)

Cask code on GitHub

Current version: 1.1.2

Analytics:

Installs (30 days)
brightness 11
Installs (90 days)
brightness 29
Installs (365 days)
brightness 106
Fork me on GitHub