Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
Streaks - The to-do list that helps you form good habits.
UnDistracted App - Use social media in a useful way. Control Facebook, YouTube, Twitter, Reddit, Netflix and LinkedIn in a responsible way.
Taskful - Deadlines, meet your match.
Deprocrastination.co - Turn your browser into a calm, lean productivity machine
ToDoList - Windows desktop application to stay on top of your daily tasks.