Aeon Timeline - "The timeline tool for creative thinking. Capture, create and explore ideas."
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.
Timeline - Timeline is a cross-platform application for displaying and navigating events on a timeline.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
SIMILE Widgets - SIMILE Widgets is an open-source “spin-off” from the SIMILE project at MIT.
Better Uptime - We call you when your website goes down