
UptimeRobot
Dashboard with 50 Monitors, Checked Every 5 Minutes, Totally Free. Monitor HTTP(s), Ping, Port and check Keywords. Get alerted via e-mail, SMS, Twitter, web-hooks or push. View uptime, downtime and response times.
Pingdom is a service for testing performance of website. Enter a URL to test the load time of that page, analyze it and find bottlenecks.
Pingdom web site monitoring and other infrastructure for you and instantly let you know when anything goes wrong. Measure uptime, downtime, and the performance of your website as experienced by visitors.
Performance Monitoring Uptime Monitoring Transactional Monitoring
Productivity Developer Tools Networking and Admin Online Services
website-monitoring performance-monitoring uptime-monitoring transactional-monitoring