LibreNMS is an autodiscovering PHP/MySQL based network monitoring system forked from Observium. LibreNMS aims to be easy to use, painless to deploy, and support monitoring of a wide range of devices. Observium's license changed to a modified QPL license in May 2012, and...
Checkmk is a monitoring tool of servers, applications, networks, cloud, containers, storage, databases, IoT and more. Checkmk is available as Raw Edition, which is 100% pure open source, and as Enterprise Edition with a lot of additional features.
Agentless server monitoring software - monitor CPU, disk, memory, network, etc. Distributed Monitoring of Windows, Linux and networks. 30-day FREE trial!
PA Server Monitor Features
EventLog Analyzer collects, archives and displays huge amount of network logs (Syslog and SNMP trap) and help net and system admins in identifying security incidents, policy violations, and operational issues.
NetVizura EventLog Analyzer Features