Ticksy - Simple, beautiful customer support.
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.
HelpNinja - Simple & Affordable help desk
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
HelpScout - Help Scout is a simple, straightforward way to provide excellent support
Better Uptime - We call you when your website goes down