Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
MUTE - Crowdsourced words list to mute on social media
Inbox Pause by Boomerang - Batch your email. Get more done.
News Feed Snooze - Hide a person, Page or group for 30 days on Facebook
Boomerang for Gmail - Boomerang for Gmail is a Firefox / Chrome plugin that lets you take control of when you send and receive email messages.
Mute Filters by Feedly - Block distracting memes, amplify news that matters