UnDistracted App - Use social media in a useful way. Control Facebook, YouTube, Twitter, Reddit, Netflix and LinkedIn in a responsible way.
FocusList - Daily planner & focus timer based on timeboxing and pomodoro
Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
Aika - A simple alternative to Google Calendar for timeblocking/timeboxing.
Go Fucking Work - Website blocker so you can get back to your fucking work
Pomotodo - Todo-list based on Pomodoro technique.