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.
CloudShell - Cloud Shell is a free admin machine with browser-based command-line access for managing your infrastructure and applications on Google Cloud Platform.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
CodeTasty - CodeTasty is a programming platform for developers in the cloud.