Pingdom Uptime-Monitoring Service Now Offering Free Accounts [Site Tools]
The popular web site uptime-monitoring service Pingdom is now offering free accounts.
The free account provides monitoring for a single web site, 20 SMS alerts—you can purchase more if you need them—and unlimited email alerts. If you want to monitor multiple sites and have access to the advanced features you'll still need a premium account.
Check out the Pingdom site for additional information on free and premium accounts.