Support Hero - Educate your customers through self-help 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.
HelpSite - HelpSite is a simple service to help your setup the perfect support centre or help site.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Better Uptime - We call you when your website goes down