PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
MySQL - The world's most popular open source database
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
MariaDB - An enhanced, drop-in replacement for MySQL
Prometheus - An open-source systems monitoring and alerting toolkit.