NIXStats - SaaS monitoring tool for window/linux servers and websites. Think up-time robot but with more features.
Komodor - The Kubernetes native troubleshooting platform
Server Monitoring - A server monitor is a tool that monitors your server and website on close intervals and reports to you if it's inaccessible.
Devo - Devo delivers real-time operational & business value from analytics on streaming and historical data to operations.
Nodeping - NodePing Server Monitoring and Web Site Monitoring. Simple but powerful Internet service monitoring.
IIS Inspector - IIS Inspector is a log management software that allows you to view and manage IIS logs on Windows servers.