What known libraries or tools for system monitoring can you name?

Among popular system monitoring tools, the following can be highlighted:

• Prometheus — a monitoring and alerting system with a powerful query language and support for time series.
• Grafana — a data visualization platform often used together with Prometheus.
• Zabbix — a comprehensive solution for monitoring servers, networks, and applications.
• Nagios — a classic tool for monitoring the availability and status of services.
• Datadog — a cloud monitoring service with extensive integration capabilities.
• New Relic — a platform for monitoring application performance.

These tools help track metrics, logs, and the state of infrastructure in real time.