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!
AirDroid Parental Control - Help parents keep kids safe and guide kids to build healthy digital habits.
Anti-Social - Anti-Social is a productivity application for Macs that turns off the social parts of the internet.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Time Sink - Time Sink helps you track how you spend your time on your Mac.
Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.