imageoptim

Install command: 
brew install --cask imageoptim

Name: ImageOptim

Tool to optimize images to a smaller size

https://imageoptim.com/mac

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

Cask code on GitHub

Current version: 1.8.8

Analytics:

Installs (30 days)
imageoptim 505
Installs (90 days)
imageoptim 1,756
Installs (365 days)
imageoptim 8,151
Fork me on GitHub