* [Prometheus](http://prometheus.io/) - Monitoring system and time series database. ([Source Code](https://github.com/prometheus/prometheus)) `Apache``Go`
* [psdash](https://github.com/Jahaja/psdash) - A linux system information web dashboard using psutils and flask
* [pyDash](https://github.com/k3oni/pydash) - Small web-based monitoring dashboard for linux. ([Demo](http://pydash.hostechs.com/main/) - _admin/admin_)
* [sensu](https://sensuapp.org/) - Monitor servers, services, application health, and business KPIs. Get notified about failures before your users do. Collect and analyze custom metrics. `MIT`
* [uchiwa](https://uchiwa.io/) - Simple dashboard for sensu
See https://github.com/n1trux/awesome-sysadmin#monitoring and https://github.com/n1trux/awesome-sysadmin#metric--metric-collection