Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
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.
BookmarkSheet - Your bookmarks in Google Sheets
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Annotate.tv - Optimize your learning on YouTube
Better Uptime - We call you when your website goes down