collectd

A daemon that collects system performance statistics periodically, and provides tons of plugins to store and analyze these values

     

linux windows osx open-source monitoring c

PowerShell Desired State Configuration

DSC is a new management platform in Windows PowerShell that enables deploying and managing configuration data for software services and managing the environment in which these services run.

     

linux windows powershell open-source commercial config-mgmt

Rex

A agent-less server orchestration tool built on Perl

     

linux windows osx open-source orchestration perl

Zabbix

An open source, enterprise-class monitoring framework

     

linux windows osx open-source monitoring c