Hyperping - Cheap uptime and performance monitoring with detailed reporting and flexible alerting
Is It Down Right Now? - Network & Admin
WebGazer - Monitor your website's availability with WebGazer, review its performance and get instant notifications when your website goes down. No installation required and free plan available.
UPDOWNtoday - UPDOWNTODAY allows you to check whether the website is down or not.
Code42 - Code42 is a SaaS solution for enterprises that secures all user data on one secure platform, leaving you and your business secure in the knowledge that both your employee's and customer's data is protected. Read more about Code42.
Is it up? - A simple tool to check if a website or ip address is up or down.