UptimeRobot - Free Website Uptime Monitoring
Komodor - The Kubernetes native troubleshooting platform
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.
Devo - Devo delivers real-time operational & business value from analytics on streaming and historical data to operations.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
IIS Inspector - IIS Inspector is a log management software that allows you to view and manage IIS logs on Windows servers.