[steveridout]

Momentum | https://chrome.google.com/webstore/detail/momentum/laookkfkn...

This displays a beautiful photograph on your "New Tab" page instead of a list of your most visited sites, which if you're anything like me is procrastination central. It serves as a reminder for me to slow down, stay focussed, and not obsessively check news, Hacker News, etc... (yep, it's not exactly working at the moment ;-)

It also allows you to specify a main task for the day to keep you focussed but I only occasionally use that.

[berwin]

I also find Earth View from Google Maps as a fun extension too. It sets your new tab to a random location on Google Maps and you can open up the location in the Maps for more in depth looks.

Earth View from Google Maps | https://chrome.google.com/webstore/detail/earth-view-from-go...

[artimaeis]

Currently | https://chrome.google.com/webstore/detail/currently/ojhmphdk...

Minimal new tab showing the date, time, and weather info. I'm always opening new tabs - this way I keep a little better track of time and am much more likely to know what it's like outside.

[fragmede]

Empty new tab page | https://chrome.google.com/webstore/detail/empty-new-tab-page...

When you open a new tab, instead of showing, well, anything, it just gives you a blank page.

[UniZero]

Benchwarmer | https://chrome.google.com/webstore/detail/benchwarmer-new-ta...

Great for designers. Beautifully displays top / new Dribbble submissions on new tab page.