Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.
Service - Customer service issues solved for you, on demand, for free.
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.
Customer Service Academy by Freshdesk - Become a customer service expert with video lessons 🎓
UptimeRobot - Free Website Uptime Monitoring