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

ConfigCat

ConfigCat is a feature flags as a service. It gives you a web based dashboard to manage your feature flags + SDKs to integrate those feature flags into your applications. ConfigCat enables you to use the same feature flags in your mobile apps, websites and server-side applications. It offers all features for free. You get an enterprise-ready SLA with the pricing plans.

     

linux osx windows open-source free commercial ci cd config-management go java net nodejs php python ruby

Monit

An open source utility for managing and monitoring processes, programs, files, directories and filesystems

     

linux osx open-source monitoring process-mgmt c

Phabricator

Phabricator is an open source collection of development and code management, including code reviews and audits, browsing repositories, tracking bugs, etc

     

linux osx open-source scm php

Rex

A agent-less server orchestration tool built on Perl

     

linux windows osx open-source orchestration perl

Sentry

Automate error tracking to find and fix issues before your users even experience a crash. Sentry is open-source, real-time, and loved by 100,000 developers around the world.

     

osx windows linux open-source errors nodejs ruby python php java monitoring

Supervisord Monitor

Supervisord Monitor is multi server monitoring tool for supervisor - watch, start and stop all your supervisord instances and servvices from one place.

     

linux windows osx open-source monitoring provisioning php process-mgmt

Zabbix

An open source, enterprise-class monitoring framework

     

linux windows osx open-source monitoring c