Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
Minimo - An elegant, simplified new tab page
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Mustsee - Discover the world’s most beautiful places
Better Uptime - We call you when your website goes down
New Tab by Flickr - Get a beautiful photo each time you open a new tab