VisualPulse Web Edition 

VisualPulse enables 24x7 Web-based monitoring of Web pages, servers and network nodes, reporting Ping, HTTP, SNMP, and TCP performance and easy-access Web-based reports. Provides automated alerts and traceroute capture for problem analysis.
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Atomic Watch 

Website Downtime = Lost Revenue Watch your website to ensure you minimize downtime and maximize uptime. If your website is down, search engines may remove your site, partners may remove links to your site, ensure your site is up at all times.
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