Famous First Websites - Discover what popular startup websites looked like at launch
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.
Channel Meter - Smarter YouTube Analytics
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Waybackpack - Download the entire Wayback Machine archive for a given URL
Better Uptime - We call you when your website goes down