Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
XperienCentral - XperienCentral is an open API content management solution that allows you to add, edit or remove content without having to touch a line of code.
UptimeRobot - Free Website Uptime Monitoring
dotCMS Cloud - dotCMS Cloud is a Hybrid Content Management System that delivers enterprise-class web content management, simple website creation, and collaboration for agencies, teams, and small and medium-sized businesses.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
DNN CMS - The original DNN Community account, but no longer active. Follow us at @DNN for DNN ecosystem and DNN Corp. news. Thanks!