UptimeRobot - Free Website Uptime Monitoring
Jira Service Desk - IT service desk and customer service software by Jira Service Desk. Powerful ticketing system used by 25,000+ organizations. Try it free today.
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.
Freshservice - Freshservice: the one-stop cloud solution for all your IT management needs.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
SolarWinds Service Desk - An IT service management (ITSM) solution that understands what it takes to successfully manage your employee services. Try Solarwinds Service Desk for free!