ImageOptim
Used by 7 peopleimageoptim.com ↗

“Whenever I save production assets, I let ImageOptim do its thing.”
Frank Rausch Interview, UI designer, app developer, typographer · via Uses This 
“ImageOptim stays in my dock on both laptops, too.”
Lara Hogan Interview, Front-end developer, performance engineering manager (Etsy) · via Uses This