Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
Workona - A better way to work in the browser.
UnDistracted App - Use social media in a useful way. Control Facebook, YouTube, Twitter, Reddit, Netflix and LinkedIn in a responsible way.
OneTab - Whenever you find yourself with too many tabs, click the OneTab icon to convert all of your tabs into a list. When you need to access the tabs again, you can either restore them individually or all at once.
Deprocrastination.co - Turn your browser into a calm, lean productivity machine
Session Buddy - Manage Your Browser Sessions