SelfControl is a free Mac app that helps you avoid distracting websites. Developed by Steve Lambert
License: Open Source
SelfControl is an open-source application targeted at Mac users, focusing on blocking websites to enhance self-discipline without ongoing costs. StayFocusd, on the other hand, is a versatile browser extension that offers extensive customization, analytics, and mobile support, making it more suitable for users who want a comprehensive solution across multiple platforms.