Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
Go Fucking Work - Website blocker so you can get back to your fucking work
Boomerang for Gmail - Boomerang for Gmail is a Firefox / Chrome plugin that lets you take control of when you send and receive email messages.
SelfControl - V2 updates! - Custom time interval for distraction free mode - Ability to turn off ' always on' mode - Improved UI -- Self Control -- A simple app to keep you focused online by blocking sites that you spend way too much time on.
FocusList - Daily planner & focus timer based on timeboxing and pomodoro
Freedom.to - Freedom is a productivity hack that lets you block apps, websites or the entire Internet on iPhones, iPads, Windows and Mac computers.