Nagios is a powerful monitoring system licensed under Nagios Enterprises that helps organizations identify and resolve IT infrastructure issues.



Agentless Monitor is described as 'Sophisticated rules engine capable of sensing rule violations within seconds and alerting you immediately. It monitors network, servers, databases, java applications, errors, and exceptions, websites etc' and is a Network Monitor. There are three alternatives to Agentless Monitor for Linux and Android. The best Agentless Monitor alternative is Nagios, which is both free and Open Source. Other great apps like Agentless Monitor are Trafikito and AppOptics.
Nagios is a powerful monitoring system licensed under Nagios Enterprises that helps organizations identify and resolve IT infrastructure issues.



Trafikito is free Linux servers monitoring solution which by default checks RAM, disk space, CPU and sends you an email if something is wrong.




Monitor applications, infrastructure, and servers in one platform. Out-of-the-box dashboards. Metrics. Analytics. Starting at $7.50/month. Free 14-day trial.