Zabbix

Zabbix - The Enterprise-class Monitoring Solution for Everyone is their motto.
Zabbix is Latvian Company which produce open-source software for real-time monitoring of milions of metrics collected from tens of thousands of servers, virtual machines and network devices.

Collect metrics from any devices, systems, applications

You can do many things with Zabbix and Integrate with various Software and other Monitoring Tools.

Integrate Zabbix with any part of your IT environment

[Expirience with Zabbix]

used Zabbix for more then 10 years (from version 1.8)
Zabbix Certified Professional
monitor:
- 90 Cisco switches
- more than 500 access points, links, base stations
- 50 firewalls (Juniper, Pfsense, Checkpoint)
- 30 linux servers (CentOs, Debian, OpenSuse)