Prometheus - An open-source systems monitoring and alerting toolkit.
Code42 - Code42 is a SaaS solution for enterprises that secures all user data on one secure platform, leaving you and your business secure in the knowledge that both your employee's and customer's data is protected. Read more about Code42.
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
SolarWinds Backup - Modern server backup software
StatsD - Simple daemon for easy stats aggregation.
Druva inSync - Your device may be lost, but your data isn’t with Druva inSync™ Integrated backup, eDiscovery and compliance monitoring.