Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
Deprocrastination.co - Turn your browser into a calm, lean productivity machine
Detox for Facebook - Replace your Facebook feed with PH, HN, DN and more.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Newsfeed Burner - Burn away distractions on Facebook, Linkedin and Youtube
PawBlock - Browser extension that blocks distracting sites