Ticksy - Simple, beautiful customer support.
statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.
HelpNinja - Simple & Affordable help desk
UptimeRobot - Free Website Uptime Monitoring
HelpScout - Help Scout is a simple, straightforward way to provide excellent support
StatusPage.io - StatusPage.io is the best way for web infrastructure, developer API, and SaaS companies to get set up with their very own status page in minutes. Integrate public metrics and allow your customers to subscribe to be updated automatically.