uBlock Origin
Finally, an efficient blocker. Easy on CPU and memory.
Download link: https://goo.gl/5S4J6F
Buffer
Buffer is the best way to share great content to Twitter, Facebook and LinkedIn from anywhere on the web, with just one click.Buffer is a better way to publish your updates on Twitter, Facebook, LinkedIn and more. It also tracks results and analyzes everything you share for you.
Download link: http://goo.gl/IXH3Q9
GKeep
Opens Google Keep with a single click in Tab or Popup. Google Keep is a cool service provided by Google.
Download link: http://goo.gl/M5KQNX
LastPass: Free Password Manager
LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device. Only remember one password – your LastPass master password. Save all your usernames and passwords to LastPass, and it will autologin to your sites and sync your passwords everywhere you need them.
Install this now!
Download link: http://goo.gl/ZBR1mk
OneTab
Save up to 95% memory and reduce tab clutter in Google Chrome. Whenever you find yourself with too many tabs, click the OneTab icon to convert all of your tabs into a list. When you need to access the tabs again, you can either restore them individually or all at once.
Download link: http://goo.gl/vrnIrX
Tab Snooze 
Close unnecessary tabs and make them magically reappear when you need them. Stop staring at tabs you can’t deal with now. Tab Snooze lets you put off tabs until later and returns them to your browser automatically, so you can focus on what’s important now.Put tabs where they belong, in the future!
Download link: http://www.tabsnooze.com/