Time Sink - Time Sink helps you track how you spend your time on your Mac.
Stay Focused - More suitable with Google Chrome, this service enables you ensure you do not waste precious time on updating Facebook status or chatting with people.
Anti-Social - Anti-Social is a productivity application for Macs that turns off the social parts of the internet.
SelfControl - V2 updates! - Custom time interval for distraction free mode - Ability to turn off ' always on' mode - Improved UI -- Self Control -- A simple app to keep you focused online by blocking sites that you spend way too much time on.
Strict Workflow - Enforces the Pomodoro time management technique by blocking distracting sites
Cold Turkey - Cold Turkey is a free productivity program that you can use to temporarily block distractions so that you can get your work done!