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!
Workona - A better way to work in the browser.
Anti-Social - Anti-Social is a productivity application for Macs that turns off the social parts of the internet.
Go to Tab - Manage your chrome tabs easily when you're multitasking
Time Sink - Time Sink helps you track how you spend your time on your Mac.
Toby - Better Than Bookmarks