GitHub Pages - A free, static web host for open-source projects on GitHub
UptimeRobot - Free Website Uptime Monitoring
Netlify - Build, deploy and host your static site or app with a drag and drop interface and automatic delpoys from GitHub or Bitbucket
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.
surge.sh - Static website hosting for front-end developers.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring