My new favorites include:
1) Share to Classroom. If you use Google Classroom, get this one. With just a click you can send any link right into Google Classroom. +#FCS Upper School Faculty
2) Google Tone. +Dan Crowley showed me this yesterday. You no longer have to email a url you like in order to share it quickly. Google Tone uses your computer's speakers to exchange URLs with nearby computers. You can send the URL to any webpage, YouTube video, even search results.
3) Google Docs Quick Create. Quickly create new google docs, spreadsheets, forms and presentations right out of your browser. It'll save you more than a few clicks.