CodeMonkey - Learn to code. Eat Bananas. Save the World.
UptimeRobot - Free Website Uptime Monitoring
GitHub Codespaces - GItHub Codespaces is a hosted remote coding environment by GitHub based on Visual Studio Codespaces integrated directly for GitHub.
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.
StackHive - Design, develop or publish websites right from your browser
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring