DownNotifier.com Alternatives

PingPlotter is a graphical traceroute and ping tool that visualizes network performance in a way that makes identifying the source of problems quicker and easier.

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.

Reliable Website uptime Monitoring , Performance monitoring & Status pages Monitor 50 URLs • 1-minute interval • 10 Global locations • 5 Public status pages.

An easy way to check whether a website is down for everybody, or just your own computer.

Ping Tracer continuously pings each network host between your computer and a given destination, helping visually identify the source of connectivity problems.

StatusCake.com is a free website monitoring tool which allows users to track up to 10 websites and get alerted when their site is down or is having trouble. Downtime root cause analysis is included in the free plan to help users diagnose and fix issues.

A simple tool to check if a website or ip address is up or down. It allows you to check to see if a site is ‘up’ or if it is a problem with your connection.

Port Monitor is an easy and online tool that does website and server monitoring for you 24/7 every 60 seconds and sends you or your co-workers instant email/push notifications when something goes wrong.

NodePing Server Monitoring and Web Site Monitoring. Simple but powerful Internet service monitoring. Checks as frequent as once a minute.

Pingbreak is an original and free monitoring service. Get notified through Twitter if your website is down. Pingbreak checks all of your websites each minute and alert you instantly by Direct Message (DM)