Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
Detox for Facebook - Replace your Facebook feed with PH, HN, DN and more.
Boomerang for Gmail - Boomerang for Gmail is a Firefox / Chrome plugin that lets you take control of when you send and receive email messages.
FocusList - Daily planner & focus timer based on timeboxing and pomodoro
FriendFilter - Auto unfriend tool for Facebook
Serene - The macOS app to get your focus back