Yesterday, I found two websites I’m responsible for were down. While Googling for status monitors, I found UptimeRobot. You can have up to 50 free monitors that will perform a status check every 5-minutes. It will send you an email when it’s down and another when in goes back online.
UptimeRobot Downtime Happens. Get Notified!
50 Monitors, Checked Every 5 Minutes, Totally Free!