Zabbix
Enterprise monitoring for networks, servers, clouds, and applications with alerting.
Why it is included
Classic open monitoring suite still common in NOCs—pairs with Prometheus in hybrid shops.
Best for
IT teams wanting agent-based monitoring with maps and SLA reporting.
If you use Windows, Mac, or paid tools
Monitoring alternative to SolarWinds NPM, PRTG (paid sensors), and Datadog infrastructure for classic IT metrics.
Strengths
- Discovery
- Templates
- Maps
Limitations
- Heavier footprint than minimal Prometheus setups
Good alternatives
Prometheus · Nagios
Related tools
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Time-series metrics and alerting with PromQL.
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System Informer
A free, powerful, multi-purpose tool that helps you monitor system resources, debug software and detect malware. Brought to you by Winsider Seminars & Solutions, Inc. @ http://www.windows-internals.com