check_mk

Check_MK is an extension to the Nagios monitoring system that allows creating rule-based configuration using Python and offloading work from the Nagios core to make it scale better, allowing more systems to be monitored from a single Nagios server. It comes with a set of system checks, a mod_python and JavaScript based web user interface, and a module that allows fast access to the Nagios core. On top of Nagios it also adds additional features

     

linux solaris bsd open-source monitoring python

Icinga 2

Icinga 2 is the newest version of Icinga. It is a scalable and extensible monitoring system which checks the availability of your resources, notifies users of outages and provides extensive BI data.

     

linux windows bsd open-source monitoring C++

Apache Libcloud

Python library for interacting with many of the popular cloud service providers using a unified API.

     

linux windows osx bsd open-source cloud-paas python

Nagios Core

Nagios Core network monitoring software is a powerful, enterprise-class host, server, application, monitoring and alerting tool

     

linux solaris bsd open-source monitoring c

Netboot.xyz

Netboot.xyz is a preconfigured iPXE bootloader that completely eliminates the need for large ISO files for a vast range of operating systems.

     

linux windows osx bsd solaris open-source free commercial provisioning virt

ntopng

'ntopng' provides an easy to understand, intuitive interface with a world of options and features to monitor your network.

     

linux bsd solaris open-source free commercial networking metrics

NXLog Enterprise and Community Editions

A multi-platform log collection suite to collect, parse, convert and send logs. Integrate with a wide range of products including SIEMs, log analytics dashboards, cloud services, databases, and more.

     

linux windows bsd solaris osx open-source free commercial logging