Monitornator - Server monitoring made simple
Komodor - The Kubernetes native troubleshooting platform
OpsDash - All-in-one solution for monitoring servers, services, uptime and databases. Curated Dashboards. Rule-based alerting.
ALog ConVerter - Server access log solution for finance and manufacturing
NIXStats - SaaS monitoring tool for window/linux servers and websites. Think up-time robot but with more features.
Google StackDriver - Stackdriver provides monitoring services for cloud-powered applications.