All-in-one uptime monitoring suite Instant downtime alert Freshping monitors your website every minute & notifies instantl ...

Cabot is a free, open-source, self-hosted infrastructure monitoring platform that provides some of the best features of PagerD ...

Comprehensive website and web application monitoring:

• simulate a real browser (Firefox) to check performance
• services monitor ...

Free Website Monitoring. Be notified when your site is down.

• no UI, we send an email when your site is down

• host it yourself ...

PHP Server Monitor is a script that checks whether your websites and servers are up and running. It comes with a web based use ...

Uptime monitor for server. Allows to monitor unlimited servers and websites. With custom CNAME you can create live status pages.

The AppBeat Android app lets you connect to your AppBeat uptime monitoring service from anywhere, anytime. You can view curren ...

Monitors your websites every 5 minutes, totally free. Get alerts by e-mail, SMS, Twitter or RSS. Add up to 50 websites. Monito ...

Opsview is award winning unified service monitoring software for complex, distributed IT infrastructures.

StatusCake enables the visitor to track unlimited websites for free and get alerts when the site is down or having trouble. St ...

Nagios is a powerful monitoring system that enables organizations to identify and resolve IT infrastructure problems before th ...

HetrixTools' Blacklist Monitor is the quick and simple way to monitor your IPs/Domains and notice if any of them get blacklist ...

Pingdom web site monitoring and other infrastructure for you and instantly let you know when anything goes wrong. Measure upti ...

"Is It Down Right Now" monitors the status of your favorite web sites and checks whether they are down or not. Check a website ...

Website monitoring service that offers a comprehensive free plan with:

• escalation levels (if a first-responder contact doesn' ...