These servces track whether your sites are up and notify you when they're down.
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Are My Sites Up?
in 1 toolbox
add to my toolboxAre My Sites Up is a very simple service to help you keep an eye on your sites and warn you if they go down.
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EZ Website Monitoring
in 4 toolboxes
add to my toolboxProvides website uptime monitoring and SEO tracking.
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HostTracker
in 2 toolboxes
add to my toolboxCheck the specified resource and service periodically according to the parameters of the monitoring set, and when an access error occur, the site will be checked by all other monitoring points; should these attempts fail, e-mail or SMS message notification of the problem will be sent.
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Internet Vista
in 2 toolboxes
add to my toolboxinternetVista® is a monitoring infrastructure that watches over your website 24 hours a day and 7 days a week. If it is unavailable or malfunctioning, you are immediately notified by email and by SMS.
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mon.itor.us
in 2 toolboxes
add to my toolboxWebsite monitoring and visitor tracking service.
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Montastic
in 1 toolbox
add to my toolboxFree website monitoring service.
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Nagios
in 4 toolboxes
add to my toolboxNagios is an Open Source host, service and network monitoring program.
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pingdom
in 2 toolboxes
add to my toolboxHosted tool for tracking web site uptime. Uses SMS to notify you when a site is down.
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Site24x7
in 2 toolboxes
add to my toolboxWeb Site Monitoring Service - monitor uptime & performance of websites.
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SiteUptime
in 2 toolboxes
add to my toolboxSiteUptime is a website monitoring service that checks your website at regular intervals and notifies you via email or SMS if it becomes unavailable.
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upPanel
in 1 toolbox
add to my toolboxupPanel.com is a website monitoring service that watches your websites and alert you if one becomes unavailable.
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Uptime Robot
in 4 toolboxes
add to my toolboxMonitors your websites every 5 minutes, totally free.
Add up to 50 websites. Get alerts by e-mail, SMS, Twitter, RSS or push notifications for iPhone/iPad.
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Website Monitoring
in 1 toolbox
add to my toolboxMonitor all your websites with this free website monitoring application. Sits in the system tray, alerts you with an icon notification and an email if your website is down or running slowly. Runs as a windows service so it will run even if not logged onto the machine.
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Zabbix
in 2 toolboxes
add to my toolboxOpensource website monitoring solution.
