Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
Mozilla Facebook Container - Take control of all your Facebook data
UnDistracted App - Use social media in a useful way. Control Facebook, YouTube, Twitter, Reddit, Netflix and LinkedIn in a responsible way.
Ghostery - Privacy tool for transparency and control
Deprocrastination.co - Turn your browser into a calm, lean productivity machine
CroxyProxy - CroxyProxy is the most advanced free and secure web proxy.