Prometheus - An open-source systems monitoring and alerting toolkit.
Clonezilla - Clonezilla is a suite of software that's designed to allow you to back-up and image new hard drives with your data.
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
Macrium Reflect - Macrium Software - the creators of Macrium Reflect backup, imaging and cloning software.
StatsD - Simple daemon for easy stats aggregation.
AOMEI Backupper - AOMEI Backupper is a software created to help a person backup, restore, clone, and sync their entire Windows system.